Researchers Are Interested in Investigating the Effect of a Drug

Researchers are interested in investigating the effect of a drug that is to be used in the treatment of patients who have glaucoma (an eye disorder associated with high eye pressure) . The goal of the drug is to reduce eye pressure. In a volunteer sample of 35 patients with glaucoma in both eyes, one eye of each patient was randomly assigned to this drug, and the other eye was given a placebo. After one week, the eye pressure was measured on each eye. The difference in eye pressure between the two eyes (drug - placebo) was measured for each patient. The sample mean difference in eye pressure was -1.21 mmHg (millimeters of mercury) , and the sample standard deviation of the differences was 4.67 mmHg.
-Using a significance level of 0.01, do we have significant evidence that the drug helps reduce eye pressure?

A) Yes, since the p-value in question 46 is small.
B) No, since the confidence interval in question 47 contains zero.
C) Yes, since the sample mean difference was negative.
D) No, since this was not a random sample.

Correct Answer:

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Sign up to view answer