A00-240 Free Practice Test

Which SAS program will correctly use backward elimination selection criterion within the REG procedure?

1. A. Option A
2. B. Option B
3. C. Option C
4. D. Option D

Correct Answer: B

An analyst has a sufficient volume of data to perform a 3-way partition of the data into training, validation, and test sets to perform honest assessment during the model building process.
What is the purpose of the test data set?

1. A. To provide a unbiased measure of assessment for the final model.
2. B. To compare models and select and fine-tune the final model.
3. C. To reduce total sample size to make computations more efficient.
4. D. To build the predictive models.

Correct Answer: A

CORRECT TEXT
A linear model has the following characteristics:
*A dependent variable (y)
*One continuous variable (xl), including a quadratic term (x12)
*One categorical (d with 3 levels) predictor variable and an interaction term (d by x1) How many parameters, including the intercept, are associated with this model?
Enter your numeric answer in the space below. Do not add leading or trailing spaces to your answer.

Solution:
7

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A

Screening for non-linearity in binary logistic regression can be achieved by visualizing:

1. A. A scatter plot of binary response versus a predictor variable.
2. B. A trend plot of empirical logit versus a predictor variable.
3. C. A logistic regression plot of predicted probability values versus a predictor variable.
4. D. A box plot of the odds ratio values versus a predictor variable.

Correct Answer: B

Refer to the REG procedure output:

Click on the calculator button to display a calculator if needed.

1. A. 0.4115
2. B. 0.6994
3. C. 0.5884
4. D. 0.1372

Correct Answer: A