显示标签为“E20-007”的博文。显示所有博文
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2014年3月17日星期一

Le meilleur matériel de formation examen EMC E20-007

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Code d'Examen: E20-007
Nom d'Examen: EMC (Data Science and Big Data Analytics)
Questions et réponses: 165 Q&As

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NO.1 A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the
Internet. What is the most appropriate model to use? Suppose labeled training data is available.
A. Na ve Bayesian classifier
B. Linear regression
C. Logistic regression
D. K-means clustering
Answer: A

EMC examen   E20-007 examen   E20-007

NO.2 What is an appropriate data visualization to use in a presentation for an analyst audience?
A. Pie chart
B. Area chart
C. Stacked bar chart
D. ROC curve
Answer: D

EMC   E20-007   certification E20-007

NO.3 In data visualization, what is used to focus the audience on a key part of a chart?
A. Emphasis colors
B. Detailed text
C. Pastel colors
D. A data table
Answer: A

certification EMC   E20-007   E20-007   E20-007 examen

NO.4 Which data asset is an example of quasi-structured data.?
A. Webserver log
B. XML data file
C. Database table
D. News article
Answer: A

EMC examen   certification E20-007   certification E20-007   E20-007

NO.5 Which word or phrase completes the statement? Data-ink ratio is to data visualization as __________ .
A. Confusion matrix is to classifier
B. Data scientist is to big data
C. Seasonality is to ARIMA
D. K-means is to Naive Bayes
Answer: A

EMC   E20-007   E20-007   E20-007   E20-007

NO.6 What does the R code
z <- f[1:10, ]
do?
A. Assigns the first 10 rows of f to the vector z
B. Assigns the 1st 10 columns of the 1st row of f to z
C. Assigns a sequence of values from 1 to 10 to z
D. Assigns the 1st 10 columns to z
Answer: A

EMC   E20-007 examen   E20-007 examen   certification E20-007

NO.7 Under which circumstance do you need to implement N-fold cross-validation after creating a
regression model?
A. There is not enough data to create a test set.
B. The data is unformatted.
C. There are missing values in the data.
D. There are categorical variables in the model.
Answer: A

EMC   E20-007   E20-007 examen   certification E20-007   certification E20-007   certification E20-007

NO.8 In R, functions like plot() and hist() are known as what?
A. generic functions
B. virtual methods
C. virtual functions
D. generic methods
Answer: B

EMC examen   E20-007   certification E20-007

NO.9 When would you use GROUP BY ROLLUP clause in your OLAP query?
A. where all subtotals and grand totals are to be included in the output
B. where only the subtotals are to be included in the output
C. where only the grand totals are to be included in the output
D. where only specific subtotals and grand totals for a combination of variables are to be included in the
output
Answer: A

EMC   E20-007   certification E20-007   E20-007 examen

NO.10 When creating a presentation for a technical audience, what is the main objective?
A. Show that you met the project goals
B. Show how you met the project goals
C. Show if the model will meet the SLA
D. Show the technique to be used in the production environment
Answer: B

EMC examen   E20-007   certification E20-007   E20-007

NO.11 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
The minimum support is 25%. Which rule has a confidence equal to 50%?
A. {bread,milk} => {cheese}
B. {bread} => {milk}
C. {juice} => {soda}
D. {bread} => {cheese}
Answer: D

EMC examen   E20-007   E20-007

NO.12 Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best
to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?
A. Pig
B. Hive
C. Howl
D. HBase
Answer: A

certification EMC   certification E20-007   E20-007 examen

NO.13 You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a
good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%.
You calculate lift = 1.011 for the rule, "People with good credit are homeowners". What can you determine
from the lift calculation?
A. Support for the association is low
B. Leverage of the rules is low
C. The rule is coincidental
D. The rule is true
Answer: C

EMC   E20-007   E20-007   certification E20-007   E20-007

NO.14 What would be considered "Big Data"?
A. An OLAP Cube containing customer demographic information about 100,000,000 customers
B. Daily Log files from a web server that receives 100,000 hits per minute
C. Aggregated statistical data stored in a relational database table
D. Spreadsheets containing monthly sales data for a Global 100 corporation
Answer: B

certification EMC   E20-007 examen   E20-007

NO.15 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a
confidence at least 50%?
A. {cheese} => {bread}
B. {juice} => {cheese}
C. {milk} => {soda}
D. {soda} => {milk}
Answer: A

certification EMC   E20-007 examen   certification E20-007

NO.16 Your company has 3 different sales teams. Each team's sales manager has developed incentive offers
to increase the size of each sales transaction. Any sales manager whose incentive program can be
shown to increase the size of the average sales transaction will receive a bonus.
Data are available for the number and average sale amount for transactions offering one of the incentives
as well as transactions offering no incentive.
The VP of Sales has asked you to determine analytically if any of the incentive programs has resulted in a
demonstrable increase in the average sale amount. Which analytical technique would be appropriate in
this situation?
A. One-way ANOVA
B. Multi-way ANOVA
C. Student's t-test
D. Wilcoxson Rank Sum Test
Answer: A

EMC   E20-007 examen   E20-007 examen   E20-007

NO.17 Which type of numeric value does a logistic regression model estimate?
A. Probability
B. A p-value
C. Any integer
D. Any real number
Answer: A

EMC examen   certification E20-007   E20-007   certification E20-007   E20-007   E20-007

NO.18 The web analytics team uses Hadoop to process access logs. They now want to correlate this data
with structured user data residing in a production single-instance JDBC database. They collaborate with
the production team to import the data into Hadoop. Which tool should they use?
A. Sqoop
B. Pig
C. Chukwa
D. Scribe
Answer: A

EMC examen   certification E20-007   certification E20-007

NO.19 In which lifecycle stage are test and training data sets created?
A. Model building
B. Model planning
C. Discovery
D. Data preparation
Answer: A

EMC   E20-007   E20-007

NO.20 You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
A. Goodness of fit
B. Coefficients
C. Standard error
D. P-value
Answer: A

EMC   E20-007 examen   certification E20-007   E20-007   certification E20-007   certification E20-007

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2013年11月11日星期一

Pass4Test offre une formation sur EMC E20-007 matériaux examen

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Code d'Examen: E20-007
Nom d'Examen: EMC (Data Science and Big Data Analytics)
Questions et réponses: 165 Q&As

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NO.1 Your company has 3 different sales teams. Each team's sales manager has developed incentive offers
to increase the size of each sales transaction. Any sales manager whose incentive program can be
shown to increase the size of the average sales transaction will receive a bonus.
Data are available for the number and average sale amount for transactions offering one of the incentives
as well as transactions offering no incentive.
The VP of Sales has asked you to determine analytically if any of the incentive programs has resulted in a
demonstrable increase in the average sale amount. Which analytical technique would be appropriate in
this situation?
A. One-way ANOVA
B. Multi-way ANOVA
C. Student's t-test
D. Wilcoxson Rank Sum Test
Answer: A

EMC examen   E20-007   E20-007   certification E20-007   E20-007

NO.2 Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best
to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?
A. Pig
B. Hive
C. Howl
D. HBase
Answer: A

certification EMC   E20-007   E20-007 examen   E20-007   certification E20-007

NO.3 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a
confidence at least 50%?
A. {cheese} => {bread}
B. {juice} => {cheese}
C. {milk} => {soda}
D. {soda} => {milk}
Answer: A

EMC   E20-007 examen   E20-007   E20-007   E20-007

NO.4 A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the
Internet. What is the most appropriate model to use? Suppose labeled training data is available.
A. Na ve Bayesian classifier
B. Linear regression
C. Logistic regression
D. K-means clustering
Answer: A

EMC   E20-007   certification E20-007

NO.5 When creating a presentation for a technical audience, what is the main objective?
A. Show that you met the project goals
B. Show how you met the project goals
C. Show if the model will meet the SLA
D. Show the technique to be used in the production environment
Answer: B

EMC examen   E20-007   E20-007   E20-007 examen   certification E20-007

NO.6 Which type of numeric value does a logistic regression model estimate?
A. Probability
B. A p-value
C. Any integer
D. Any real number
Answer: A

certification EMC   E20-007 examen   certification E20-007

NO.7 What does the R code
z <- f[1:10, ]
do?
A. Assigns the first 10 rows of f to the vector z
B. Assigns the 1st 10 columns of the 1st row of f to z
C. Assigns a sequence of values from 1 to 10 to z
D. Assigns the 1st 10 columns to z
Answer: A

EMC examen   certification E20-007   E20-007   E20-007

NO.8 In data visualization, what is used to focus the audience on a key part of a chart?
A. Emphasis colors
B. Detailed text
C. Pastel colors
D. A data table
Answer: A

EMC   E20-007   E20-007   E20-007 examen   E20-007

NO.9 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
The minimum support is 25%. Which rule has a confidence equal to 50%?
A. {bread,milk} => {cheese}
B. {bread} => {milk}
C. {juice} => {soda}
D. {bread} => {cheese}
Answer: D

EMC   E20-007   E20-007

NO.10 In which lifecycle stage are test and training data sets created?
A. Model building
B. Model planning
C. Discovery
D. Data preparation
Answer: A

EMC   E20-007 examen   E20-007 examen   E20-007   E20-007

NO.11 Which word or phrase completes the statement? Data-ink ratio is to data visualization as __________ .
A. Confusion matrix is to classifier
B. Data scientist is to big data
C. Seasonality is to ARIMA
D. K-means is to Naive Bayes
Answer: A

EMC   E20-007   E20-007   E20-007 examen

NO.12 When would you use GROUP BY ROLLUP clause in your OLAP query?
A. where all subtotals and grand totals are to be included in the output
B. where only the subtotals are to be included in the output
C. where only the grand totals are to be included in the output
D. where only specific subtotals and grand totals for a combination of variables are to be included in the
output
Answer: A

EMC   E20-007   certification E20-007   E20-007   E20-007

NO.13 Under which circumstance do you need to implement N-fold cross-validation after creating a
regression model?
A. There is not enough data to create a test set.
B. The data is unformatted.
C. There are missing values in the data.
D. There are categorical variables in the model.
Answer: A

EMC   E20-007   E20-007 examen   E20-007

NO.14 Which data asset is an example of quasi-structured data.?
A. Webserver log
B. XML data file
C. Database table
D. News article
Answer: A

EMC   E20-007 examen   E20-007   certification E20-007   E20-007

NO.15 You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a
good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%.
You calculate lift = 1.011 for the rule, "People with good credit are homeowners". What can you determine
from the lift calculation?
A. Support for the association is low
B. Leverage of the rules is low
C. The rule is coincidental
D. The rule is true
Answer: C

EMC   E20-007   E20-007

NO.16 You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
A. Goodness of fit
B. Coefficients
C. Standard error
D. P-value
Answer: A

EMC   E20-007 examen   E20-007 examen   E20-007   E20-007

NO.17 What is an appropriate data visualization to use in a presentation for an analyst audience?
A. Pie chart
B. Area chart
C. Stacked bar chart
D. ROC curve
Answer: D

EMC   E20-007 examen   E20-007   E20-007 examen

NO.18 The web analytics team uses Hadoop to process access logs. They now want to correlate this data
with structured user data residing in a production single-instance JDBC database. They collaborate with
the production team to import the data into Hadoop. Which tool should they use?
A. Sqoop
B. Pig
C. Chukwa
D. Scribe
Answer: A

EMC   certification E20-007   certification E20-007

NO.19 What would be considered "Big Data"?
A. An OLAP Cube containing customer demographic information about 100,000,000 customers
B. Daily Log files from a web server that receives 100,000 hits per minute
C. Aggregated statistical data stored in a relational database table
D. Spreadsheets containing monthly sales data for a Global 100 corporation
Answer: B

certification EMC   E20-007   E20-007

NO.20 In R, functions like plot() and hist() are known as what?
A. generic functions
B. virtual methods
C. virtual functions
D. generic methods
Answer: B

EMC examen   E20-007 examen   E20-007   E20-007

Est-que vous s'inquiétez encore à passer le test Certification E20-007 qui demande beaucoup d'efforts? Est-que vous travaillez nuit et jour juste pour préparer le test de EMC E20-007? Si vous voulez réussir le test EMC E20-007 plus facilement? N'hésitez plus à nous choisir. Pass4Test vous aidera à réaliser votre rêve.

2013年8月15日星期四

Le plus récent matériel de formation examen EMC E20-891 E20-814 E20-007 E20-880 E10-001 E20-326 de certification

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Code d'Examen: E20-891

Nom d'Examen: EMC (Backup Recovery Solutions Expert Exam for Technology Architects)

Questions et réponses: 118 Q&As

Code d'Examen: E20-814

Nom d'Examen: EMC (Symmetrix Solutions Expert Exam for Storage Administrators)

Questions et réponses: 116 Q&As

Code d'Examen: E20-007

Nom d'Examen: EMC (Data Science and Big Data Analytics)

Questions et réponses: 165 Q&As

Code d'Examen: E20-880

Nom d'Examen: EMC (VNX Solutions Expert Exam for Technology Architects)

Questions et réponses: 128 Q&As

Code d'Examen: E10-001

Nom d'Examen: EMC (Information Storage and Management Exam Version 2)

Questions et réponses: 185 Q&As

Code d'Examen: E20-326

Nom d'Examen: EMC (Symmetrix Solutions Design Exam)

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NO.1 An EMC NetWorker customer has just started running backups of their new Microsoft
SharePoint distributed farm. They are concerned that their web applications are not being backed
up.
What can you tell the customer about backing up web applications?
A. Web applications are backed up with the corresponding content database
B. Add the web application name to the save set field for the client hosting the content database
C. Create a separate client resource for each web application
D. Web applications must be backed up with a file system backup method
Answer: A

EMC   certification E20-891   certification E20-891   E20-891

NO.2 A customer has an EMC Data Domain appliance that has reached 90% of maximum capacity.
The customer does not want to purchase any additional storage.
What will increase the average available capacity of the Data Domain appliance?
A. Decrease the backup retention period
B. Decrease the cleaning frequency
C. Increase the snapshot expiration period
D. Increase the number of streams
Answer: B

EMC examen   E20-891   certification E20-891   E20-891

NO.3 An EMC customer is currently backing up their Microsoft Exchange database to an EMC
Avamar server. The backups are setup to full on Friday, skip on Sunday, and only
transaction logs backed up the rest of the week. The customer would like to integrate Data Domain
to Avamar and run the database backups to the Data Domain system.
If a Data Domain system is deployed on Sunday, which type of backup runs on the following Monday?
A. Full database backup
B. Transaction logs backup
C. Backups will be skipped
D. Level 1 backup of the database
Answer: A

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NO.4 A customer has implemented EMC Data Domain Boost for Oracle RMAN software in their
environment and are successfully backing up several Oracle servers. Backups are directed to a local
Data Domain system and a second Data Domain system was configured at their disaster recovery
site as a target for replication.
What needs to be done to create copies of the backup data on the remote system that are tracked
and recoverable by RMAN?
A. Modify the RMAN script to include backup copies
B. Configure directory replication between the Data Domain systems
C. Configure Mtree replication between the Data Domain systems
D. Create a second RMAN script for the second Data Domain system
Answer: A

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NO.5 A customer recently integrated EMC Avamar into their existing NetWorker datazone. After
creating a deduplication client and defining the NetWorker deduplication node, the backup is
started. However, the backup failed.
What must be done to perform a successful backup?
A. Create a local AFTD on the storage node to store deduplication metadata
B. Create an AFTD on the Avamar server to store deduplication metadata
C. Create an AFTD to store the deduplication indexes
D. Create an AFTD to store the additional bootstrap information
Answer: A

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NO.6 You are planning an MS SQL backup solution for a customer using EMC NetWorker and NMM
without a proxy client. Which user privilege must be configured on NetWorker?
A. Add the NMM client to the NetWorker Administrator user group
B. Add the NetWorker Administrator to the NMM remote user setting
C. Add the NMM client to the MS Windows administrators user group
D. Add the NMM client to the Operators user group
Answer: A

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NO.7 An EMC NetWorker customer wants to add their new Microsoft SharePoint distributed farm to
their backup environment. The farm contains three servers. One server contains the web front-end
and the other two servers each contain two SQL databases.
How is the number of the client resources determined?
A. One resource for each server in the farm
B. One resource for each SQL database in the farm and one for the web front-end server
C. Only one resource for the entire farm
D. One resource for each SQL database in the farm
Answer: A

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NO.8 An existing EMC Data Domain customer wants to know the way to integrate Data Domain
with RMAN to their tape library. How would this integration take place?
A. Use RMAN and Media Manager Layer to backup the application
B. Use RMAN with NFS to write to tape
C. Use RMAN with DD Boost to move data to the tape library
D. Use RMAN with dNFS to write to the tape library
Answer: A

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NO.9 A customer is planning to use EMC NetWorker integrated with Data Domain to backup their
enterprise. Data Domain will be used to replicate backups to an offsite location to satisfy regulatory
requirements. The customer is concerned about the difficulty in managing their backups and
backup clones with two interfaces.
What could be done to simplify the management of backups and clones?
A. Configure DD Boost with NetWorker and use clone-controlled replication.
B. Configure pre and post scripts to handle the cloning.
C. Create one backup job for cloning and one additional job for local copies.
D. Create scripts to run through the CLI to handle daily cloning.
Answer: A

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NO.10 While installing an EMC Avamar deduplication node in a NetWorker backup solution, the
Microsoft Windows client backup jobs fail to run. Which process should be running on the client
during the backup?
A. nsravtar
B. nsravamar
C. nsrim
D. nsrndmpsv
Answer: A

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2013年7月18日星期四

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Code d'Examen: E20-007

Nom d'Examen: EMC (Data Science and Big Data Analytics)

Questions et réponses: 165 Q&As

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NO.1 Your company has 3 different sales teams. Each team's sales manager has developed incentive offers
to increase the size of each sales transaction. Any sales manager whose incentive program can be
shown to increase the size of the average sales transaction will receive a bonus.
Data are available for the number and average sale amount for transactions offering one of the incentives
as well as transactions offering no incentive.
The VP of Sales has asked you to determine analytically if any of the incentive programs has resulted in a
demonstrable increase in the average sale amount. Which analytical technique would be appropriate in
this situation?
A. One-way ANOVA
B. Multi-way ANOVA
C. Student's t-test
D. Wilcoxson Rank Sum Test
Answer: A

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NO.2 When creating a presentation for a technical audience, what is the main objective?
A. Show that you met the project goals
B. Show how you met the project goals
C. Show if the model will meet the SLA
D. Show the technique to be used in the production environment
Answer: B

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NO.3 What is an appropriate data visualization to use in a presentation for an analyst audience?
A. Pie chart
B. Area chart
C. Stacked bar chart
D. ROC curve
Answer: D

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NO.4 Which word or phrase completes the statement? Data-ink ratio is to data visualization as __________ .
A. Confusion matrix is to classifier
B. Data scientist is to big data
C. Seasonality is to ARIMA
D. K-means is to Naive Bayes
Answer: A

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NO.5 The web analytics team uses Hadoop to process access logs. They now want to correlate this data
with structured user data residing in a production single-instance JDBC database. They collaborate with
the production team to import the data into Hadoop. Which tool should they use?
A. Sqoop
B. Pig
C. Chukwa
D. Scribe
Answer: A

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NO.6 Which type of numeric value does a logistic regression model estimate?
A. Probability
B. A p-value
C. Any integer
D. Any real number
Answer: A

EMC   E20-007   E20-007   E20-007   E20-007

NO.7 What does the R code
z <- f[1:10, ]
do?
A. Assigns the first 10 rows of f to the vector z
B. Assigns the 1st 10 columns of the 1st row of f to z
C. Assigns a sequence of values from 1 to 10 to z
D. Assigns the 1st 10 columns to z
Answer: A

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NO.8 When would you use GROUP BY ROLLUP clause in your OLAP query?
A. where all subtotals and grand totals are to be included in the output
B. where only the subtotals are to be included in the output
C. where only the grand totals are to be included in the output
D. where only specific subtotals and grand totals for a combination of variables are to be included in the
output
Answer: A

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NO.9 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
The minimum support is 25%. Which rule has a confidence equal to 50%?
A. {bread,milk} => {cheese}
B. {bread} => {milk}
C. {juice} => {soda}
D. {bread} => {cheese}
Answer: D

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NO.10 Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a
confidence at least 50%?
A. {cheese} => {bread}
B. {juice} => {cheese}
C. {milk} => {soda}
D. {soda} => {milk}
Answer: A

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NO.11 Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best
to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?
A. Pig
B. Hive
C. Howl
D. HBase
Answer: A

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NO.12 You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a
good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%.
You calculate lift = 1.011 for the rule, "People with good credit are homeowners". What can you determine
from the lift calculation?
A. Support for the association is low
B. Leverage of the rules is low
C. The rule is coincidental
D. The rule is true
Answer: C

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NO.13 In R, functions like plot() and hist() are known as what?
A. generic functions
B. virtual methods
C. virtual functions
D. generic methods
Answer: B

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NO.14 Which data asset is an example of quasi-structured data.?
A. Webserver log
B. XML data file
C. Database table
D. News article
Answer: A

EMC   E20-007   E20-007   E20-007

NO.15 You are using MADlib for Linear Regression analysis. Which value does the statement return?
SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;
A. Goodness of fit
B. Coefficients
C. Standard error
D. P-value
Answer: A

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NO.16 A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the
Internet. What is the most appropriate model to use? Suppose labeled training data is available.
A. Na ve Bayesian classifier
B. Linear regression
C. Logistic regression
D. K-means clustering
Answer: A

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NO.17 What would be considered "Big Data"?
A. An OLAP Cube containing customer demographic information about 100,000,000 customers
B. Daily Log files from a web server that receives 100,000 hits per minute
C. Aggregated statistical data stored in a relational database table
D. Spreadsheets containing monthly sales data for a Global 100 corporation
Answer: B

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NO.18 In which lifecycle stage are test and training data sets created?
A. Model building
B. Model planning
C. Discovery
D. Data preparation
Answer: A

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NO.19 In data visualization, what is used to focus the audience on a key part of a chart?
A. Emphasis colors
B. Detailed text
C. Pastel colors
D. A data table
Answer: A

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NO.20 Under which circumstance do you need to implement N-fold cross-validation after creating a
regression model?
A. There is not enough data to create a test set.
B. The data is unformatted.
C. There are missing values in the data.
D. There are categorical variables in the model.
Answer: A

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