A hypothesis test is to be performed to determine whether the mean waiting time during peak hours for customers in a grocery store has increased from the previous mean waiting time of 8.3 minutes. Preliminary data analyses indicate that it is reasonable to apply a z-test. The hypotheses are: H0: μ = 8.3 minutes Ha: μ > 8.3 minutes The population standard deviation is 3.6 minutes. The sample size is 45. The significance level is 0.05. Find the probability of a Type II error if in fact the mean waiting time, μ, is 9.8 minutes. i. 0.125
ii. 0.95
iii. 0.875
iv. 0.05