A cholesterol test was given to ten heart patients with high cholesterol levels.The same ten heart patients are then given a new cholesterol-reducing drug for six months.Before the patients begin taking the drug,they are told to maintain their current diets and eating habits so that the effect of the drug can be more effectively determined.After taking the drug for six months,the same patients are given a cholesterol test again.The cholesterol levels before and after taking the drug are given below.The cholesterol level readings are not normally distributed.At α = .05,test to determine if the drug is helpful in reducing cholesterol levels.Cholesterol level Patient

A) Reject the null hypothesis.
B) Do not reject the null hypothesis.

Question

A cholesterol test was given to ten heart patients with high cholesterol levels.The same ten heart patients are then given a new cholesterol-reducing drug for six months.Before the patients begin taking the drug,they are told to maintain their current diets and eating habits so that the effect of the drug can be more effectively determined.After taking the drug for six months,the same patients are given a cholesterol test again.The cholesterol levels before and after taking the drug are given below.The cholesterol level readings are not normally distributed.At α = .05,test to determine if the drug is helpful in reducing cholesterol levels.Cholesterol level Patient

A) Reject the null hypothesis. 
B) Do not reject the null hypothesis.

Quizplus · Accepted Answer

A non-parametric test should be used for non-normally distributed data, and the Wilcoxon signed-rank test is appropriate for this situation. Using this test, we find a p-value of 0.0074, which is less than the significance level of 0.05. Therefore, we reject the null hypothesis and conclude that the drug is helpful in reducing cholesterol levels.

A Cholesterol Test Was Given to Ten Heart Patients with High