According to the central limit theorem, a sampling distribution of the mean will approach a normal distribution as long as which of the following is true?
a. At least 50 random, repeated samples are drawn.
b. The population has at least 50 cases.
c. Each repeated, random sample has at least 50 cases.
d. The size of the population standard deviation is at least 50.
e. The size of the population standard deviation is less than 50.
f. σ, not s, is used to calculate the standard error of the mean.