In a study on 160 patients living in saudi Arabia of age 15 or more, the mean blood glucose level was 32.5 mmol/l. Suppose that the blood glucose levels for such patients have a normal distribution with a standard deviation of 3.7 mmol/1. 1. Find a point estimate for the mean blood glucose level. 2. Find a 90% confidence interval for the mean blood glucose level. Solution n = X = 2) Interval Estimation: a = %3D 1- 2 An 90% confidence interval for u is