Find the mean and standard deviation of the sample mean where the random samples of size 225 are drawn from a population with mean 100 and standard deviation 20.
a. Mean of the sample mean = 100, Standard deviation of the sample mean = 1.33
b. Mean of the sample mean = 100, Standard deviation of the sample mean = 0.94
c. Mean of the sample mean = 100, Standard deviation of the sample mean = 0.47
d. Mean of the sample mean = 100, Standard deviation of the sample mean = 0.21