Question

A random sample of 100 cable TV movies contained an average of 3.38 acts of physical violence per program. At the 99% level what is your estimate of the population value?

mean = 3.38
s = 0.30
N = 100

Answer 1

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score.

99% = mean ± Z * SEm

SEm = SD/√n = s/√N

Answer 2

0.019