Charlotte obtains a random sample of 120 students from a university, finds out each person’s age, and calculates M and s. Why is M not exactly equal to μ?
a. Because the sample is random.
b. Because the sample size is >50.
c. Because the sample is not large enough.
d. Because of sampling error.
e. Because the population value for μ was wrong.
f. Because the central limit theorem does not apply when μ is known.
g. This could not occur.