A random sample of 225 observations were selected from a

Last updated: 8/14/2022

A random sample of 225 observations were selected from a population with a mean μ = 20 and variance σ2 = 144. Find mean and standard deviation of the sampling distribution of the sample mean. mean = 20, s.d. = 12 mean = 20, s.d. = 0.64 mean = 0.9, s.d. = 0.8 mean = 20, s.d. = 0.8 mean = 0.9, s.d. = 12