Question

The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual.

For a sample of n=60​, find the probability of a sample mean being less than 20.2 if μ=20 and σ=1.24.

For a sample of n=60 the probability of a sample mean being less than 20.2 if μ=20and sigmaσ =1.24 is ____

The sample mean _____be considered unusual because it has a probability that is____than​ 5%.

Answer 1