AP Stat Unit 9 review solutions 2016.notebook February 04, 2016
Feb 46:43 AM
5. We will construct a 95% matched pairs t confidence interval for the true mean difference in active ingredient in the Name brand vs the Generic brand of pills .
Conditions: The pills were randomly selected, and we assume independence
(it is reasonable that the population of pills is more than 10 times the sample
of 10 pills each.)
Normality:
Differences: 1, 4, 5, 13, 0, 7, 5, 8, 9, 16
It is reasonable to assume Normality from the following boxplot of the
differences, which has no skewness or outliers.
AP Stat Unit 9 review solutions 2016.notebook February 04, 2016
Feb 46:49 AM
We are 95% confident that the true mean difference in active drug
between the Name brand and the Generic brand is between 2.83 mg
and 10.37mg. Therefore, since zero is NOT contained in the interval,
we have evidence there really does exist a difference in active drug between
Name brand and Generic.