In a test of the eflectiveness of garic for lowering cholesterol, 47 mubjecta were treated with garic in a processed tablet form. Cholesterol levels were measured before and after the treatment The changes in their kevels of LDL cholesterol (in moidi.) have a mean of 3.4 nd a standard deviation of 16.5. Complete parts (a) and (b) below. a. What in the best point estmate of the populaton mean net change in LDL cholesterol ater the garlic beatment? The best point estimate 34 mo (Type an integer ora decimal) b. Construct a 0O% confdence interval estimate of the mean net change in LDL cholesterol uter the garic treatment. What doen he corldence ieterval suggest about the effectiveress of garie in reduong LDL cholestaron What in the confdence interval estimate of the population mean (Round to two deonal places as rneeded)

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