Question

4. Assume the population of weights of men is normally distributed with a mean of 175 lb. and a standard deviation 30 lb. Find the probability that 20 randomly selected men will have a mean weight that is greater than 178 lb.

Answer 1

Given that, mean = 175 lb and

standard deviation = 30 lb

sample size ( n ) = 20

We want to find,

Therefore, the probability that 20 randomly selected men will have a mean weight that is greater than 178 lb is 0.3264