Question

When subjects were treated with a​ drug, their systolic blood pressure readings​ (in mm​ Hg) were measured before and after the drug was taken. Results are given in the table below. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Using a

0.05

significance​ level, is there sufficient evidence to support the claim that the drug is effective in lowering systolic blood​ pressure?

Before	189	175	188	155	189	184	157	205	161	195	158	169
After	167	162	179	156	155	152	152	143	167	176	159	186

dentify the test statistic.

t=nothing

​(Round to two decimal places as​ needed.)

Answer 1