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

P(5.u)                   

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