and not 7. The measurements of the drying time, in hours, of a certain brand of latex paint follow a normal distribution. SuppoSc 20 mcasurements of the drying timcs are recorded. The sample mean and the standnrd deviation of 20 mcasurenents is 3.77 and 0.946, respec- tively. (a) Construct a 90% confidence interval for the true mcan measurements of the drying times. Assumne that the distribution of the mcasuremCnts of the drying timcs is upproximately normal. (b) Find the 95% confidence into