A new drug designed to reduce fever is being tested for how will it works and for side effects. Ten patients entering a hospital with a high fever were selected at random. The temperature in degrees Celsius was measured, the drug was given, and two hours later the temperature was measured again.

The mini-tab output is below.

Paired T-Test and Cl; Before, After N Mean St. Dev SE Mean Be fore 10 39.140 1, 032 0 .326 After 10 37. 550 0. 961 0.304 Difference 10 1. 590 1. 475 0 .466 T-Test of mean difference = 0 (v8 > 0) : T-Value = 3.41 P-Value = 0.004