How many TV sets? A survey organization sampled 60 households in a community and found that the sample mean number of TV sets per household was 3.1. The population standard deviation is σ = 1.5. Can you conclude that the mean number of TV sets per household is greater than 3?

a. State the null and alternate hypotheses.

b. Should we perform a z-test or a t-test? Explain.

c. Compute the value of the test statistic.

d. Do you reject H0? Use the α = 0.01 level.

e. State a conclusion.