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

Answer: Joe will do Two-tailed test

Ho: μ = 38

H1; μ ≠ 38

Here Joe want to check whether the average age of the population of California is  equal to or not 38 years.

Hence it is two tailed test.

if Population standard deviation ( $\sigma$ ) is given then Joe will do Two tailed Z test

if sample standard deviation (s) is given then Joe will do Two tailed t test

OPTION ( B ).