Discussion:
Q: 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) Mean and standard deviation for 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?