Test statistic and critical value

Question

Test the claim that the mean GPA of night students is significantly different than 2.7 at the 0.2 significance level.

Correct

The test is: 

two-tailed

left-tailed

right-tailed

Correct

Based on a sample of 75 people, the sample mean GPA was 2.72 with a standard deviation of 0.03

The test statistic is:  (to 2 decimals)

The positive critical value is:  (to 2 decimals)

Answer 1

Two tailed (significantly different, could be less could be more)

t = (2.72 - 2.7) / (0.03/sqrt(75)) = 5.77