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sample-2_001

# sample-2_001 - STA 3024 Exam 2 Sample Questions Note...

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STA 3024 Exam 2 Sample Questions Note: Several sample exam questions covered material from the last few pages of Chapter 6, which we won’t have time to cover. I’ve left those questions out, but I’ve kept the original question numbers for the remaining questions so that I don’t have to redo the answer key. 1. In the two-way ANOVA F test for interaction, which of the following corresponds to a large p-value? (A) a large value of the test statistic (B) data that gives little or no evidence that there is interaction (C) both (A) and (B) (D) neither (A) nor (B) 2. This question covered material ineligible for inclusion on the exam. 3. In two-way ANOVA, it is appropriate to perform the tests for main effects only if we conclude that (A) it’s reasonable that there is no interaction. (B) there is interaction. 4. In a two-way ANOVA F test for the main effect of Factor A, if there are two categories of Factor A, four categories of Factor B, and 16 total observations, what value of the test statistic F A would correspond to a p-value of 0.05? 5. A data set produces the two-way ANOVA table shown below. Source df SS MS Factor A 4 7.974 1.993 Factor B 1 0.240 0.240 Interaction 4 1.174 0.293 Error 35 8.777 0.251 Total 44 18.165 Which of the following is true?

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6. Suppose a data set yields the two-way ANOVA table shown below. Source df SS MS Factor A 3 112.56 37.52 Factor B 1 304.98 304.98 Interaction 3 10.08 3.36 Error 16 294.27 18.39 Total 23 721.89 Calculate the test statistic for the two-way ANOVA F test for the main effect of Factor B. 7. The population means of the four groups in a two-way ANOVA setup with two categories of each factor are shown below. Sodium Intake Gender High Low Male 2.2 3.1 Female 2.8 4.8 True or false: There is interaction. (A) True (B) False 8. In a one-way ANOVA F test for data with three groups and 33 total observations, suppose we calculate a test statistic value of F = 4 . 29 . Then the p-value of the test is (A) less than 0.05. (B) greater than 0.05.

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