Author:
Christine Farr

Question 1 (1 point)Assume that we conduct a survey of KSU and GA Tech business school alumni. In total, 230 alumni respondto our survey, 150 GA Tech graduates and 80 KSU graduates. From this survey we construct the followingincome data: GA Tech graduates (150 responders), average income 71,000, and the standard deviation is12,000; KSU graduates (80 responders), average income 64,000, and the standard deviation is 15,000.If we assume that the two population standard deviations are UNKNOWN BUT ASSUMED TO BE EQUAL (afterall these are graduates with similar degrees from GA public colleges who graduated roughly during the sametime period) and decide to perform a pooled variance hypothesis test for the equality of the populationaverage incomes, what would the pooled variance be for the test (rounded to the nearest integer)?Question 1 options:19780176298017628159447None of the aboveSaveQuestion 2 (1 point)Assume that we conduct a survey of KSU and GA Tech business school alumni. In total, 230 alumni respondto our survey, 150 GA Tech graduates and 80 KSU graduates. From this survey we construct the followingincome data: GA Tech graduates (150 responders), average income 71,000, and the standard deviation is12,000; KSU graduates (80 responders), average income 64,000, and the standard deviation is 15,000.Assume that the two population standard deviations are UNKNOWN AND CAN’T BE ASSUMED EQUAL. Pleaseconduct a hypothesis test for the equality of the two population means (average incomes of the two groups:GA Tech and KSU graduates) with 90% significance. Would you reject the null hypothesis of the equality ofthe two means?Question 2 options:Reject the null that the two population means are the sameFail to reject the null that the two population means are the sameNot enough information is providedSaveQuestion 3 (1 point)Assume that we conduct a survey of KSU and GA Tech business school alumni. In total, 230 alumni respondto our survey, 150 GA Tech graduates and 80 KSU graduates. From this survey we construct the followingincome data: GA Tech graduates (150 responders), average income 71,000, and the standard deviation is12,000; KSU graduates (80 responders), average income 64,000, and the standard deviation is 15,000.Assume that the two population standard deviations are UNKNOWN AND CAN’T BE ASSUMED EQUAL. If weconduct a hypothesis test for the equality of the two population means (average incomes of the two groups:GA Tech and KSU graduates) with 90% significance, what would the DEGREES OF FREEDOM for the teststatistic be?Question 3 options:

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