SAS Institute A00-240 Online Practice Questions and Exam Preparation

SAS Institute A00-240 Online Questions & Answers

• Question 61:

  Refer to the exhibit:

  

  The plots represent two models, A and B, being fit to the same two data sets, training and validation.

  Model A is 90.5% accurate at distinguishing blue from red on the training data and 75.5% accurate at doing the same on validation data. Model B is 83% accurate at distinguishing blue from red on the training data and 78.3% accurate at

  doing the same on the validation data.

  Which of the two models should be selected and why?

  A. Model A. It is more complex with a higher accuracy than model B on training data.
  B. Model A. It performs better on the boundary for the training data.
  C. Model B. It is more complex with a higher accuracy than model A on validation data.
  D. Model B. It is simpler with a higher accuracy than model A on validation data.
  D. Model B. It is simpler with a higher accuracy than model A on validation data.

• Question 62:

  Refer to the exhibit:

  

  On the Gains Chart, what is the correct interpretation of the horizontal reference line?

  A. the proportion of cases that cannot be classified
  B. the probability of a false negative
  C. the probability of a false positive
  D. the prior event rate
  B. the probability of a false negative

• Question 63:

  An analyst generates a model using the LOGISTIC procedure. They are now interested in getting the sensitivity and specificity statistics on a validation data set for a variety of cutoff values. Which statement and option combination will generate these statistics?

  A. Score data=valid1 out=roc;
  B. Score data=valid1 outroc=roc;
  C. mode1 resp(event= '1') = gender region/outroc=roc;
  D. mode1 resp(event"1") = gender region/ out=roc;
  B. Score data=valid1 outroc=roc;

• Question 64:

  A researcher has several variables that could be possible predictors for the final model. There is interest in checking all 2-way interactions for possible entry to the model. The researcher has decided to use forward selection within PROC LOGISTIC. Fill in the missing code option that will ensure that all 2-way interactions will be considered for entry.

  

  A. start = 5
  B. include = 4
  C. include = 5
  D. start = 4
  C. include = 5

• Question 65:

  Which SAS program will divide the original data set into 60% training and 40% validation data sets, stratified by county?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  C. Option C

• Question 66:

  Fill in the Blank

  Refer to the REG procedure output:

  

  How many observations are used in the analysis? Enter your numeric answer in the space below.

  100

• Question 67:

  Fill in the Blank

  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).

  0.5671

• Question 68:

  Refer to the exhibit.

  

  Given alpha=0.02, which conclusion is justified regarding percentage of body fat, comparing small (S), medium (M), and large (L) wrist sizes?

  A. Medium wrist size is significantly different than small wrist size.
  B. Large wrist size is significantly different than medium wrist size.
  C. Large wrist size is significantly different than small wrist size.
  D. There is no significant difference due to wrist size.
  C. Large wrist size is significantly different than small wrist size.

• Question 69:

  Refer to the exhibit:

  

  Which statement is true, based on the plots above?

  A. Approximately twice as many customers with the top ten percent of predicted probabilities are expected to have a positive versus negative event.
  B. Approximately ten percent of a randomly selected subset of twenty percent of the customers are expected to have a positive event.
  C. Approximately twenty percent of the customers with a predicted score of 3 have a positive predicted class.
  D. Approximately ten percent of those customers with the top twenty percent of predicted probabilities are expected to have a positive event.
  A. Approximately twice as many customers with the top ten percent of predicted probabilities are expected to have a positive versus negative event.

• Question 70:

  Given the following SAS data set TEST:

  

  Which SAS program is NOT a correct way to create dummy variables?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  D. Option D