question 9

Identify the distribution of the sample mean. In particular, state whether the distribution of x is normal or approximately normal and give its mean and standard deviation. 9] The heights of people in a certain population are normallyr distributed with a mean of 6-1 inches and 9} a standard deviation 01-317 inches. Determine the sampling distribution of the mean for samples of size 40. A] Normal, mean = 64 inches, standard deviation = 3.7 inches B) Approximately normal, mean 2 :54 inches, standard deviation 2 0.09 inches C) Normal, mean = 6-4 inches, standard deviation = 0.39 inches D) N orrnal, mean = 64 inches, standard deviation = 0.09 inches