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 a = 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 Ho? Use the a = 0.01 level.
e. State a conclusion.