A simple random sample of size22has mean=70.89and standard deviations=15.73. The population distribution is unknown. Determine the correct method of finding a95% confidence interval for the population mean and compute it.

Question 4 options:

A)

z-method: (63.91,77.87)

B)

t-method: (63.91,77.87)

C)

z-method: (64.32,77.46)

D)

Cannot compute: the population size is too small.