Question 630763
Null hypothesis: µ = 13.7
Alternative hypothesis: µ < 13.7 (Claim)
z Test
Test Statistic, z: -0.7692
Critical z:        -1.6449
P-Value:           0.2209


Fail to Reject the Null Hypothesis
Sample does not provide enough evidence to support the claim that the mean completion time has decreased under new management