DRAWING INFERENCES ABOUT POPULATION MEANS AND PROPORTIONS

**Case Assignment**

A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?
**Cholesterol Decreased**

**No Cholesterol Decrease**

**Total**Treatment 38 18 56 No treatment 30 28 58

**Total**68 46 114 Submit a (2-3 pages) paper before the end of the module that:

- Briefly describe the procedure for testing hypotheses.
- Formulate the null and alternative hypotheses.
- Determine the test statistic that you will use.
- Calculate the p-value. Show your work.
- Discuss whether there is enough evidence to reject the null hypothesis.