The following table shows the results after four weeks (number of pounds lost).

Drug Placebo

9 8

5 6

11 2

8 3

6 5

3 6

14 2

You want to prove that the drug is effective with α=.05.

Calculate the following

1) Meanand standard deviationfor each sample.

2) Since it is a small sample we will use the t-distribution, so you have to use the formula for degrees of freedom( page 409).

3) State H0 and Hα.

4) Calculate the t – statistic.

5) Find the critical value.

6) State your case whether there is enough evidence to support the claim.

Do we reject or fail to reject H0? Why or why not?

Please see the attached file for the solution.

Drug Placebo

9 8

5 6

11 2

8 3

6 5

3 6

14 2

You want to prove that the drug is effective with α=.05.

Calculate the following

1) …

The mean, standard deviation, t-distribution, t-statistic, and the critical value is calculated for a new weight loss drug.