SAS Institute A00-240 Online Practice Questions and Exam Preparation

SAS Institute A00-240 Online Questions & Answers

• Question 31:

  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
  D. -1.0415

• Question 32:

  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
  C. multicollinearity

• Question 33:

  A marketing analyst assessed the effect of web page design (A, B, or C) on customers' intent to purchase an expensive product. The focus group was divided randomly into three sub-groups, each of which was asked to view one of the web pages and then give their intent to purchase on a scale from 0 to 100. The analyst also asked the customers to give their income, which was coded as: I (lowest), II (medium), or III (highest). After analyzing the data, the analyst claimed that there was significant interaction and the webpage design mainly influenced high income people.

  Which graph supports the analyst's conclusion?

  

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

• Question 34:

  Which characteristic of Studentized residuals indicate potential outliers?

  A. Only studentized residuals greater than negative two
  B. Only studentized residuals less than negative two and greater than two
  C. Only studentized residuals greater than two
  D. Only studentized residuals less than two and greater than negative two
  C. Only studentized residuals greater than two

• Question 35:

  Spearman statistics in the CORR procedure are useful for screening for irrelevant variables by investigating the association between which function of the input variables?

  A. Concordant and discordant pairs of ranked observations
  B. Logit link (log (p/1-p))
  C. Rank-ordered values of the variables
  D. Weighted sum of chi-square statistics for 2x2 tables
  C. Rank-ordered values of the variables

• Question 36:

  PROC GLMSELECT was used for building a model predicting the natural log of a baseball player's salary from certain performance and longevity statistics. The model used backward elimination using SBC as its selection criterion. The sequence of steps is summarized in the graphic shown below:

  

  At Step 9 number of at bats (nAtBat) was removed from the model. Why was it removed?

  A. Removing nAtBat had the largest effect on the parameter estimate of nHits.
  B. The p-Value for nAtBat was largest.
  C. Removing nAtBat yielded the largest improvement to SBC.
  D. The p-Value for nAtBat was smallest.
  B. The p-Value for nAtBat was largest.

• Question 37:

  This question will ask you to provide a missing option. Given the following SAS program:

  

  What option must be added to the program to obtain a data set containing Pearson statistics?

  A. OUTPUT=estimates
  B. OUTP=estimates
  C. OUTSTAT=estimates
  D. OUTCORR=estimates
  B. OUTP=estimates

• Question 38:

  Assume a $10 cost for soliciting a non-responder and a $200 profit for soliciting a responder. The logistic regression model gives a probability score named P_R on a SAS data set called VALID. The VALID data set contains the responder variable Pinch, a 1/0 variable coded as 1 for responder. Customers will be solicited when their probability score is more than 0.05.

  Which SAS program computes the profit for each customer in the data set VALID?

  

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

• Question 39:

  Which SAS program will best identify influential observations in a multiple regression application?

  

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

• Question 40:

  Fill in the Blank

  Refer to the confusion matrix:

  

  An analyst determines that loan defaults occur at the rate of 3% in the overall population. The above confusion matrix is from an oversampled test set (1 = default).

  What is the sensitivity adjusted for the population event probability?

  Enter your answer in the space below. Round to three decimals (example: n.nnn).

  0.617