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Chrome File Edit View History Bookmarks People Window Help USF xQuiz: Midterm Exam xMyUSF x G The Bonferroni intervals show Chegg Study | Guided Solutio x Carlos (-? Secure https://usflearn.instructure.com/courses/1281532/quizzes1778034/take USF Question 15 4 pts We are trying to determine, once and for all, if there is a difference between the average GPA of al Female and Male USF students. Data was collected and the following printout was generated. Two-Sample T Tests for GPA by Gender GenderN Female Male Mean SD SE 97 3.3977 0.4220 0.0428 110 3.2804 04330 00413 0.1173 0.4279 00596 T-Tests for Mean Difference Null Hypothesis: difference . 0 Alternative Hyp: difference O Lower Upper 95% CL Method Variances DF T Paoled Satterthwaite Unequal 202.9 3.05 00026 00643 0.2989 Homogeneity of Variances DF F Folded F Test Which of the following conclusions would be correct when interpreting the confidence interval shown on the printout? 95% C.L Equa 205 3.05 0.0026 0.0641 02991 Help 09,96 1.05 0,3992 We are 95% confident that lit-um. O At the 95% confidence level, we cannot determine which mean is bigger. @ We are 95% confident that rum. we are 95% confident that ?-m. of the five sales closing techniques. The data on trust levels for all 50 49,296

Explanation / Answer

The confidence intervals given at the 95% confidence level are:

(-0.0641 , 0.2991) in the pooled method and (-0.0643, 0.2989) in the other method.

Now as 0 is contained inside the intervals, we cannot determine which mean is bigger as the value of the difference could be both positive or negative.

Therefore At 95% confidence level, we cannot determine the bigger mean. Therefore B is the correct answer here.

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