A simple random sample of size 65 has mean x = 38.16. The population standard deviation is = 5.95. Can you conclude that the

A simple random sample of size 65 has mean x̄ = 38.16. The population standard deviation is σ = 5.95. Can you conclude that the mean is less than 40? Use the

α = 0.01 level of significance.

In Exercises 1–4, state which type of parameter is to be tested; then perform the hypothesis test.