EMC E20-007 Online Practice Questions and Exam Preparation

EMC E20-007 Online Questions & Answers

• Question 171:

  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.
  A. There is not enough data to create a test set.

• Question 172:

  Which characteristic applies mainly to Data Science as opposed to Business Intelligence?

  A. Advanced analytical methods
  B. Robust reporting
  C. Focus on structured data
  D. Data dashboards
  A. Advanced analytical methods

• Question 173:

  You are performing a marketing analysis on baskets using the Apriori algorithm. Which measure is a ratio that describes how many more times two items are present together than would be expected if those two items are statistically independent?

  A. Lift
  B. Leverage
  C. Support
  D. Confidence
  A. Lift

• Question 174:

  What describes a true property of a Logistic Regression method?

  A. Robust with redundant variables and correlated variables
  B. Handles missing values well
  C. Works well with discrete variables that have many distinct values
  D. Works well with variables that affect the outcome in a discontinuous way
  A. Robust with redundant variables and correlated variables

• Question 175:

  Refer to the exhibit.

  

  In the exhibit, the x-axis represents the derived probability of a borrower defaulting on a loan. Also in the exhibit, the pink represents borrowers that are known to have not defaulted on their loan, and the blue represents borrowers that are known to have defaulted on their loan.

  Which analytical method could produce the probabilities needed to build this exhibit?

  A. Logistic Regression
  B. Linear Regression
  C. Discriminant Analysis
  D. Association Rules
  A. Logistic Regression

• Question 176:

  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
  C. A presentation for project sponsors

• Question 177:

  Which word or phrase completes the statement?

  Business Intelligence is to ad-hoc reporting and dashboards as Data Science is to ______________ .

  A. Optimization and Predictive Modeling
  B. Alerts and Queries
  C. Structured Data and Data Sources
  D. Sales and profit reporting
  A. Optimization and Predictive Modeling

• Question 178:

  You do a Student's t-test to compare the average test scores of sample groups from populations A and B. Group A averaged 10 points higher than group B. You find that this difference is significant, with a p-value of 0.03. What does that mean?

  A. There is a 3% chance that you have identified a difference between the populations when in reality there is none.
  B. The difference in scores between a sample from population A and a sample from population B will tend to be within 3% of 10 points.
  C. There is a 3% chance that a sample group from population A will score 10 points higher that a sample group from population B.
  D. There is a 97% chance that a sample group from population A will score 10 points higher that a sample group from population B.
  A. There is a 3% chance that you have identified a difference between the populations when in reality there is none.

• Question 179:

  What is the primary bottleneck in text classification?

  A. The availablilty of tagged training data.
  B. The ability to parse unstructured text data.
  C. The high dimensionality of text data.
  D. The fact that text corpora are dynamic.
  A. The availablilty of tagged training data.

• Question 180:

  Which key role for a successful analytic project can provide business domain expertise with a deep understanding of the data and key performance indicators?

  A. Business Intelligence Analyst
  B. Project Manager
  C. Project Sponsor
  D. Business User
  A. Business Intelligence Analyst