Researchers are interested in investigating the effect of a drug that is to be used in the treatment of patients who hav

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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). In a volunteer sample of 37 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 -1.28 mmHg (millimeters of mercury), and the sample standard deviation of the differences was 4.68 mmHg.
Use the 2SD method to find a 95% confidence interval for the population mean difference in eye pressure (drug - placebo). Round to
two decimal places.