Question

A University of Florida economist conducted a study of Virginia elementary school lunch menus. During the state-mandated testing period, school lunches average 863 calories. The economist claimed that after the testing period end, the average calories content of Virginia school lunches dropped significantly. Set up the null and alternative hypothesis to test the economist`s claim. Let m be the average calories content of Virginia school lunches.

Answer 1

The null hypothesis: m >= 863 calories

(School lunches average 863 calories.)

The alternative hypothesis: m < 863 calories.

(average calories content of school lunches dropped significantly)

Explanation:

School lunches average 863 calories.

The claim: After the testing period end, the average calories content of Virginia school lunches dropped significantly.

Let m be average calories content of Virginia school lunches.

The null hypothesis: m >= 863 calories

(School lunches average 863 calories.)

The alternative: m < 863 calories.

(average calories content of school lunches dropped significantly)