A pharmaceutical company claims that a new drug reduces cholesterol levels in patients. A random sample of 100 patients who took the drug for a month had a mean cholesterol reduction of 15 mg/dL with a standard deviation of 5 mg/dL. The company wants to test if the drug is effective in reducing cholesterol levels by at least 10 mg/dL. Perform a hypothesis test at a significance level of 0.01 to determine if there is evidence to support the company's claim.

Q: WOW THANKS! Can you help with question 18 too? I realized I already answered 20 after i sent it

A: Here is the solution:

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