T Stat =T stat = 2.675Use =T.DIST.2T(2.675,59) to find the p-value.Question 7 of 201.0/ 1.0 PointsNull:old style is better Alternative: new style is better The “Pizza Hut” manager commits a TypeI error if he/she isA. switching to new style when it is no better than old styleAnswer Key: AQuestion 8 of 201.0/ 1.0 PointsIn an article appearing inToday’s Healtha writer states that the average number of calories in aserving of popcorn is 75. To determine if the average number of calories in a serving of popcornis different from 75, a nutritionist selected a random sample of 20 servings of popcorn andcomputed the sample mean number of calories per serving to be 78 with a sample standarddeviation of 7.Compute the z or t value of the sample test statistic.C. t = 1.916Answer Key: CFeedback: Use T, because the sample size is small and this is referring to a sample with a meanand SD.T stat =Question 9 of 201.0/ 1.0 Points

Which if the following values defaults to alpha when no significance level is given?D. 0.05Answer Key: DQuestion 10 of 201.0/ 1.0 PointsThe null and alternative hypotheses divide all possibilities into:C. two non-overlapping setsAnswer Key: CPart 4 of 7 - Hypothesis Testing 2 Unknown Questions3.0/ 3.0 PointsQuestion 11 of 201.0/ 1.0 PointsClick to see additional instructionsYou are testing the claim that the mean GPA of night students is different from the mean GPA ofday students. You sample 30 night students, and the sample mean GPA is 2.34 with a standarddeviation of 0.456. You sample 25 day students, and the sample mean GPA is 2.59 with astandard deviation of 0.482. Test the claim using a 10% level of significance. Assume thesample standard deviations are unequal and that GPAs are normally distributed.Hypotheses:H0: μ1= μ2H1: μ1≠ μ2What is the test statistic for this scenario? Round to 4 decimal places.t = -1.9627Answer Key: -1.9627Feedback: T-stat =Question 12 of 201.0/ 1.0 PointsTwo random samples are taken from private and public universities (out-of-state tuition) around

the nation. The yearly tuition is recorded from each sample and the results can be found below.Test to see if the mean out-of-state tuition for private institutions is statistically significantlyhigher than public institutions. Assume unequal variances. Use a 1% level of significance.Private Institutions (Group 1) Public Institutions (Group 2)43,12025,46928,19019,45034,49018,34720,89328,56042,98432,59234,75021,87144,89724,12032,19827,45018,43229,10033,98121,87029,49822,65031,98029,14322,76425,37954,19023,45037,75623,87130,12928,74533,98030,120

47,90921,19032,20021,54038,12026,346Hypotheses:H0: μ1(?)μ2H1: μ1(?)μ2What are the correct hypotheses for this problem?D. H0: μ1= μ2; H1: μ1>μ2Answer Key: DFeedback: Upper tailed test because of the keyword higherQuestion 13 of 201.0/ 1.0 PointsClick to see additional instructionsTwo random samples are taken from private and public universities (out-of-state tuition) aroundthe nation. The yearly tuition is recorded from each sample and the results can be found below.Test to see if the mean out-of-state tuition for private institutions is statistically significantlyhigher than public institutions. Assume unequal variances. Use a 1% level of significance andround answers to 4 decimal places.

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