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.
-Which scenario in the Theory-Based Inference applet would you use for these data?
A) One proportion
B) One mean
C) Two proportions
D) Two means

Question

Quizplus · Accepted Answer

The scenario in the Theory-Based Inference applet that would be used for these data is One mean. This is because the researchers are interested in investigating the effect of a drug on eye pressure, and they have measured the difference in eye pressure between the two eyes (drug - placebo) for each patient. The sample mean difference in eye pressure is -1.21 mmHg, and the sample standard deviation of the differences is 4.67 mmHg.

Researchers Are Interested in Investigating the Effect of a Drug