Question

Before a high-school football game the footballs were inflated to p = 13 psi (pounds per square inch). After the game the mean inflation was 12.5 psi.

Select the null hypothesis H0.


Group of answer choices


0=13


0=12.5


0<13


0>12.5

Answer 1

The null hypothesis is
`H_0: \mu = 13`

Explanation:

Before a high-school football game the footballs were inflated to p = 13 psi (pounds per square inch).

This means that, as we are going to test the inflation levels before and after the game, we test at the null hypothesis that it is of 13 psi, that is:

`H_0: \mu = 13`