1. You are a nurse working in a nutrition outpatient clinic of a large teaching hospital. You are interested in whether garlic is effective in reducing cholesterol levels. You conduct a pre-post study of 49 subjects enrolled at the clinic that were treated with raw garlic for a 12-week period. Cholesterol levels were measured before and after treatment. The changes (before minus after) in their levels of low-density lipoprotein (LDL) cholesterol (in mg/dL) have a mean of 0.4 and a standard deviation of 21.0. Use this information to answer the questions below.

Test the claim that, with garlic treatment, the mean change in LDL cholesterol is greater than 0. Assume a confidence level of 95% for the test and show all 5 steps of your hypothesis test.

Calculate the 95% confidence interval for the mean change in LDL level. Does the confidence interval support the conclusions from the test that you conducted in question a? Explain.

Need to use 5 step hypothesis test and hand write, no excel or minitab.