Question: Local health authorities are concerned that the hectic pace in their city has elevated the stress, and thus the blood pressure of women. The authorities have decided to study this issue by measuring the blood pressure of a random sample of patients in the city over the next year and estimating the mean blood pressure, µ, of women in the city. Blood pressure is approximately normally distributed in humans, and a 15-year-old study suggests the standard deviation of women’s blood pressure is about 8 mm Hg. Suppose the health authorities accept this value as a reasonable estimate of the standard deviation of blood pressure of today’s women in the city. If it is desired to estimate µ to within 1.0 mm Hg with 95% confidence, what sample size is necessary (show work).