The average amount if rainfall during the summer months is 11.52. A researcher selects a random sample a 10 cities and finds that the average amount of rainfall in summer months in 2015 was 10.42. The standard deviation of the sample is 2.3 inches. Can it be concluded at 5% significant level that for 2015 summer months the mean rainfall was below 11.52?

a. State the hypothesis.

b. State what kind of test you will be using: t-test or z-test.

c. The test value.

d. The critical value or p-value.

e. The decision