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12/12/17, 12:07 AMPrint TestPage 3 of 7d) 18e) f) None of the above.9Question 5Your answer is INCORRECT.A study reports the mean change in HDL (high-density lipoprotein, or "good" cholesterol) of adultseating raw garlic six days a week for six months. The margin of error for a 95% confidence interval isgiven as plus or minus 7 milligrams per deciliter of blood (mg/dl). This means thatQuestion 6Your answer is CORRECT.Suppose you wish to perform a hypothesis test for a population mean. Suppose that the populationstandard deviation is known, the population is symmetric, and the sample is small. Would you performa z-test or t-test?