# Hypothesis Test Involving data from two samples

#### Lucyzzz

A new AIDS prevention drug was tried on a group of 204 HIV positive patients. Forty-three patients developed AIDS after four years. In a control group of 204 HIV positive patients, 68 developed AIDS after four years. We want to test whether the method of treatment reduces the proportion of patients that develop AIDS after four years or if the proportions of the treated group and the untreated group stay the same.

Starting cholesterol level Ending cholesterol level
140 140
200 250
100 110
240 220
200 190
180 150
190 200
360 300
280 300
260 240

A) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.)

B) P-value.

Ok, I did before -- after. I edit my list in the calculator with the data and after I used T-Test

I get. t=.74199 and p=.76149. But the computer give me wrong. What do I need to do then?

ohh also I think is dependent samples

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