Module 4 BHS 220

Due 2 Feb 2018

Drawing Inferences About Population Means and Proportions

Case 2 pages

SLP 2 pages

Case 4: Drawing Inferences about Population Means and Porportions

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?

Total

	Cholesterol Decreased	No Cholesterol Decrease		Total
Treatment	38	18	56
No treatment	30	28	58
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.

SLP 4: Drawing Inferences about Population Means and Porportions

Having developed the null and alternative hypotheses in the previous module, write a (2-3 pages) paper in which you:

1. Identify a test statistic to help you assess the evidence against the null hypothesis you developed in the previous module.

2. Explain why you have chosen the specific test statistic. Include in your discussion description of the test statistic.

3.

Summarize your findings by creating a summary graph in which you display your data.

4. Discuss the total number of measurements (sample size), the possibility for measurement error, and whether it is large enough to paint an accurate picture.