EMC EMC Certifications E20-007 Questions & Answers

• Question 191:

  What is LOESS used for?

  A. It fits a smoothed curve to scatterplot data, to give a general sense of the data's behavior.

  B. It is a significance test for the correlation between two variables.

  C. It plots a continuous variable versus a discrete variable, to compare distributions across classes.

  D. It is run after a one-way ANOVA, to determine which population has the highest mean value.

  Correct Answer: A

• Question 192:

  What is required in a presentation for business analysts?

  A. Budgetary considerations and requests

  B. Operational process changes

  C. Detailed statistical explanation of the applicable modeling theory

  D. The presentation author's credentials

  Correct Answer: B

• Question 193:

  Refer to the exhibit.

  

  You have scored your Naive bayesian classifier model on a hold out test data for cross validation and determined the way the samples scored and tabluated them as shown in the exhibit.

  What are the Precision and Recall rate of the model?

  A. Precision = 262/277 Recall = 262/288

  B. Precision =262/288 Recall = 262/277

  C. Precision = 277/262 Recall = 288/262

  D. Precision = 288/262 Recall = 277/262

  Correct Answer: A

• Question 194:

  What is a core deliverable at the end of the analytic project?

  A. An implemented database design

  B. A whitepaper describing the project and the implementation

  C. A presentation for project sponsors

  D. The training materials

  Correct Answer: C

• Question 195:

  In which phase of the analytic lifecycle would you expect to spend most of the project time?

  A. Discovery

  B. Data preparation

  C. Communicate Results

  D. Operationalize

  Correct Answer: B

• Question 196:

  You are provided four different datasets. Initial analysis on these datasets show that they have identical mean, variance and correlation values. What should your next step in the analysis be?

  A. Visualize the data to further explore the characteristics of each data set

  B. Select one of the four datasets and begin planning and building a model

  C. Combine the data from all four of the datasets and begin planning and bulding a model

  D. Recalculate the descriptive statistics since they are unlikely to be identical for each dataset

  Correct Answer: A

• Question 197:

  Which word or phrase completes the statement; "A theater actor is to `artistic and expressive' as a data scientist is to ____________."?

  A. Communicative and collaborative

  B. Introverted and technical

  C. Logical and steadfast

  D. Independent and intelligent

  Correct Answer: A

• Question 198:

  You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. When is the analytics lifecycle considered completed?

  A. When written documentation has been produced and the code has been handed off to the DBA/ operations.

  B. When a model has been completely developed and the results have shown statistically acceptable results.

  C. When the results of the model have been presented to both the internal analytics team and the business owner of the project.

  D. When a model has been completely developed based on both a sample of the data and the entire set of data available.

  Correct Answer: A