Question 748918
Null Hypothesis, H0:  µ ≥ 12.4
Alternative Hypothesis, H1: µ < 12.4


&#945; = 0.10


Test Statistic, t = {{{(11.2 - 12.4)/(2/sqrt(15))}}} =  -2.3238
Critical t:        -1.3450
P-Value:           0.0179

Reject the Null Hypothesis because the p-value is less than 0.10.
Sample provides evidence to reject the claim that drivers have an average of at least 12.4 years' experience.