A00-240 Online Practice Questions and Answers

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Refer to the REG procedure output:

Calculate the coefficient of determination, R-Square.

Enter your numeric answer in the space below. Round to 4 decimal places (example: n.nnnn).

Refer to the confusion matrix:

Calculate the sensitivity. (0 - negative outcome, 1 - positive outcome)

Click the calculator button to display a calculator if needed.

A. 25/48

B. 58/102

C. 25/B9

D. 58/81

An analyst compares the mean salaries of men and women working at a company. The SAS data set SALARY contains variables:

1.

Gender (M or F)

2.

Pay (dollars per year)

Which SAS programs can be used to find the p-value for comparing men's salaries with women's salaries? (Choose two.)

A. Option A

B. Option B

C. Option C

D. Option D

A non-contributing predictor variable (Pr > |t| =0.658) is added to an existing multiple linear regression model.

What will be the result?

A. An increase in R-Square

B. A decrease in R-Square

C. A decrease in Mean Square Error

D. No change in R-Square

The standard form of a linear regression model is:

Which statement best summarizes the assumptions placed on the errors?

A. The errors are correlated, normally distributed with constant mean and zero variance.

B. The errors are correlated, normally distributed with zero mean and constant variance.

C. The errors are independent, normally distributed with constant mean and zero variance.

D. The errors are independent, normally distributed with zero mean and constant variance.

Consider scoring new observations in the SCORE procedure versus the SCORE statement in the LOGISTIC procedure.

Which statement is true?

A. The SCORE statement in the LOGISTIC procedure returns only predicted probabilities, whereas the SCORE procedure returns only predicted logits.

B. The SCORE statement in the LOGISTIC procedure returns only predicted logits, whereas the SCORE procedure returns only predicted probabilities.

C. Unlike the SCORE procedure, the SCORE statement in the LOGISTIC procedure produces both predicted probabilities and predicted logits.

D. The SCORE procedure and the SCORE statement in the LOGISTIC procedure produce the same output.

The following LOGISTIC procedure output analyzes the relationship between a binary response and an ordinal predictor variable, wrist_size Using reference cell coding, the analyst selects Large (L) as the reference level.

What is the estimated logit for a person with large wrist size?

Click the calculator button to display a calculator if needed.

A. 0.0819

B. 0.5663

C. -3.7727

D. -1.0415

The SAS data set RESULT contains the following variables:

1.

Region (GrpA or GrpB)

2.

Sales (dollars per year)

Which SAS programs can be used to find the p-value for comparing GrpA sales with GrpB sales? (Choose two.)

A. Option A

B. Option B

C. Option C

D. Option D

The Model SS in a multiple linear regression model is equal to:

A. the total SS- MSE

B. the sum of Type I SS of all model terms

C. the sum of Type II SS of all model terms

D. the sum of SSE and MSE

A researcher is planning a logistic regression to model the probability of disease occurrence. The researcher determines the rate of disease occurrence in the population is 1%.

For which of the following would this study be a candidate?

A. over fitting

B. oversampling

C. multicollinearity

D. simple random sample