Question

Homework: HOMEWORK # 5 Score: 0 of 1 pt 8.3.15-T Save 29 of 32 (15 complete) ▼ Hw Score: 43.44%, 13.9 of 32 pts EQuestion Help In a test of the effectiveness of garic for lowering cholesterol, 36 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus afte) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.4 and a standard deviation of 23.5. Use a 0.05 significance level to test the claim that with gartic treatment, the mean change in LDL cholesterol is greater than 0 What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and altemative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? Hi: H0 mg/dl ○ C. Ho: μ:0mg/dL i: H0 mg/d Click to select your answer and then click Check Answer brary This course (STA2023MIAMIDADE(ACSPRING2019) s based on Triola: Elementary Statistics, 13e with integrated Review 回 a up

Answer 1

We have to test whether the mean change is greater than zero.The null is always the negation or nullity of the the claim that we wish to test. Since, we wish to test that the difference is greater than (different from zero), the null hypothesis would be that the difference is equal to zero i.e.Garlic has no effect in lowering cholesterol.

Assuming that $\dpi{80} \mu$ denotes the mean difference before and after,

To test:

b. $\dpi{80} H_{0}:\mu =0$ mg/dL Vs   $\dpi{80} H_{a}:\mu>0$ mg/dL (Claim to be tested)