Suppose that you want to know whether the variance of the midterm grades of all

Question

Suppose that you want to know whether the variance of the midterm grades of all students who have taken BAN122 is greater than 100 or not. To know this, you plan to collect a random sample of 30 students and use your sample to make the inference. What statistical test should you conduct? a. test b. T test c. x^2 test d. F test Suppose that you want to know whether the variance of the midterm grades of Dr. King's BAN 122 is the same as that of Dr. Queen's BAN122. To know this, you plan to collect two random samples, one from each instructor's students, and use your samples to make the inference. What statistical test should you conduct? a. Z test b. T test c. x^2 test d. F test

Explanation / Answer

2) This is a case of 2 sample independent t test as we are trying to compare 2 samples for means.

1) This is again a case of 1 sample t test where we want to compare the sample statisitic against a pre determined value 100 , 1 tail t test because it is greater than 100

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