Data Science Mock Test 8

10%

Question 1 of 10

1. caret stands for classification and regression training.

False

True

Question 1 of 10

Question 2 of 10

2. Which of the following is correct with respect to residuals?

Positive residuals are above the line, negative residuals are below

Positive residuals and negative residuals are below the line

Positive residuals are below the line, negative residuals are above

All of the mentioned

Question 2 of 10

Question 3 of 10

3. Linear models are the most useful applied statistical technique.

False

True

Question 3 of 10

Question 4 of 10

4. Which of the following is the correct formula for total variation?

Total Variation = Residual Variation - Regression Variation

Total Variation = Residual Variation + Regression Variation

All of the mentioned

Total Variation = Residual Variation * Regression Variation

Question 4 of 10

Question 5 of 10

5. Collection of exchangeable binary outcomes for the same covariate data are called _______ outcomes.

binomial

direct

none of the mentioned

random

Question 5 of 10

Question 6 of 10

6. Multivariate regression estimates are exactly those having removed the linear relationship of the other variables from both the regressor and response.

False

True

Question 6 of 10

Question 7 of 10

7. Which of the following can be used to create sub–samples using a maximum dissimilarity approach?

inmaxDissim

all of the mentioned

minDissim

maxDissim

Question 7 of 10

Question 8 of 10

8. Which of the following function is a wrapper for different lattice plots to visualize the data?

featurePlot

plotsample

levelplot

none of the mentioned

Question 8 of 10

Question 9 of 10

9. Point out the correct statement.

none of the mentioned

findLinearColumns will also return a vector of column positions can be removed to eliminate the linear dependencies

findLinearCombos will return a list that enumerates dependencies

the function findLinearRows can be used to generate a complete set of row variables from one factor

Question 9 of 10

Question 10 of 10

10. Which of the following can be useful for diagnosing data entry errors?

dffit

resid

hat values

all of the mentioned

Question 10 of 10