Question

The government claims that the average age of Texans is 38 years. Blake hypothesizes that the average age of the population of Texas is not equal to 38 years. Blake records a sample mean equal to 41 and states the hypothesis as u = 38 vs u 38.

Select the best description for this type of test.
a.) Right-tailed test
b.) Two-tailed test thing
c.) Left-tailed test
d.) Upper-tailed test

Answer 1

Two-tailed test

Explanation:

Got it right on the test.

Answer 2

b.) Two-tailed test

Explanation:

Blake hypothesizes that the average age of the population of Texas is not equal to 38 years.

This means that at the alternative hypothesis, we test if the average is different of 38, that is:

`H_1: \mu \\eq 38`

When the test at the alternative hypothesis is of difference, we have a two-tailed test, and thus the answer is given by option b.