1

Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple ramdom samples selected from normaly distributed populations, and do not assume taht the population standar deviations are equal. Complete parts a and b below

Treatment sham Mean mean1 mean2 n 19 19 x 0.51 0.38 s 0.73 1.46

A) Use a 0.05 significance level, and test the claim that those treated with magnets have a greater mean reduction pain that those given a sham treatment

What are the null and alternative hypotheses

The test statustuc t is ____________

the P-Value is _________

State the conclusion for the test

______ the null hypotheses. There _____ sufficient evidence to support the claim that those treatde with magnets have a greater mean reduction in pain than those given a sham treatment

Since the _____ got those treated with magnets is _______ the sample mean for those given a sham treatment, it ____ valid to argue that magnets might appear to be effective if the sample sizes are larger

B) Construct a confidence interval suitable for testing the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatmen

_____ < population mean 1 - population mean 2 _______