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Part 1 of 8 -Question 1 of 171.0 PointsA pharmaceutical company is testing the effectiveness of a new drug for loweringcholesterol. As part of this trial, they wish to determine whether there is a difference between theeffectiveness for women and for men. Assumeα = 0.05. What is the test value?WomenMenSample size5080Mean effect76.95Sample variance34A.t = 3.252B.t = 0.151C.z = 0.081D.z = 0.455Reset SelectionQuestion 2 of 171.0 PointsAn investor wants to compare the risks associated with two different stocks. One way tomeasure the risk of a given stock is to measure the variation in the stock’s daily price changes.In an effort to test the claim that the variance in the daily stock price changes for stock 1 isdifferent from the variance in the daily stock price changes for stock 2, the investor obtains arandom sample of 21 daily price changes for stock 1 and 21 daily price changes for stock 2.The summary statistics associated with these samples are: n1= 21, s1= .725, n2= 21, s2= .529.If you compute the test value by placing the larger variance in the numerator, at the .05 level ofsignificance, would you conclude that the risks associated with these two stocks are different?
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A.No, the p-value associated with this test is 0.0528B.Yes, the p-value associated with this test is 0.0264C.No, the test value of 1.879 does not exceed the critical value of 2.46D.No, the test value of 1.371 does not exceed the critical value of 2.12Reset SelectionQuestion 3 of 171.0 PointsMultiple myeloma or blood plasma cancer is characterized by increased blood vesselformulation in the bone marrow that is a prognostic factor in survival. One treatment approachused for multiple myeloma is stem cell transplantation with the patient’s own stem cells. Thefollowing data represent the bone marrow microvessel density for a sample of 7 patients whohad a complete response to a stem cell transplant as measured by blood and urine tests. Twomeasurements were taken: the first immediately prior to the stem cell transplant, and the secondat the time of the complete response.Patient1234567Before158189202353416426441After284214101227290176290Suppose you wanted to conduct a test of hypothesis to determine if there is sufficient evidenceto conclude that the mean bone marrow microvessel density is higher before the stem celltransplant than after the stem cell transplant? What is the p-value associated with the test ofhypothesis you would conduct?A.p = .057493B.p = .942597C.p = .114986D.p = .885014Reset SelectionPart 2 of 8 -Question 4 of 171.0 Points
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