Apu Math 302 Quiz 5 - Latest

APU MATH 302 Quiz 5 - Latest

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Question 1 of 17 1.0/ 1.0 Points

Two independent samples of sizes n1 = 50 and n2 = 50 are randomly selected from two populations to test the difference between the population means, . The sampling distribution of the sample mean difference, is:

A.approximately normal

B.chi-squared distributed with 99 degrees of freedom

C.t - distributed with 98 degrees of freedom

D.normally distributed

Answer K

Question 2 of 17 0.0/ 1.0 Points

A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Assume α = 0.05. What is the test value?

Women Men

Sample size 50 80

Mean effect 7 6.95

Sample variance 3 4

A.t = 0.151

B.z = 0.081

C.z = 0.455

D.t = 3.252

Feedback: This is a t-test of independent samples. To compue the test value t use:

Question 3 of 17 1.0/ 1.0 Points

Which of the following statements is true regarding the F – distribution?

A.It is a distribution of negative values

B.It is always skewed to the left

C.It typically appears in tests of equal proportions

D.none of the above

Part 2 of 8 - 3.0/ 5.0 Points

Question 4 of 17 1.0/ 1.0 Points

The correlation value ranges from

A.-3 to +3

B.–1 to +1

C.0 to +1

D.–2 to +2

Answe

Question 5 of 17 1.0/ 1.0 Points

Data for a sample of 25 apartments in a particular neighborhood are provided in the worksheet Apartments in the Excel workbook Apartments.xlsx. Using that data, find the estimated regression equation which...