A Hypothesis Test Is to Be Performed $8.4$ Minutes the Manager Has Installed a New Computer System and Possible

Multiple Choice

A hypothesis test is to be performed. Describe the two possible outcomes of the test using the context of the givensituation.
-Last month the average waiting time at a bank was $8.4$ minutes. The manager has installed a new computer system and claims that people will no longer have to wait as long.
The hypotheses are as follows:
Null hypothesis: average waiting time $= 8.4$ minutes
Alternative hypothesis: average waiting time $< 8.4$ minutes

A) Rejecting the null hypothesis means there is evidence that the mean waiting time is less than $8.4$ minutes.
Failing to reject the null hypothesis means there is insufficient evidence to conclude that the mean waiting time is less than $8.4$ minutes.
B) Rejecting the null hypothesis means there is evidence that the mean waiting time is not equal to $8.4$ minutes.
Failing to reject the null hypothesis means there is insufficient evidence to conclude that the mean waiting time is less than $8.4$ minutes.
C) Rejecting the null hypothesis means there is insufficient evidence that the mean waiting time is equal to $8.4$ minutes.
Accepting the null hypothesis means there is evidence to conclude that the mean waiting time is equal to $8.4$ minutes.
D) Rejecting the null hypothesis means there is evidence that the mean waiting time is less than $8.4$ minutes.
Accepting the null hypothesis means there is evidence to conclude that the mean waiting time is equal to $8.4$ minutes.