An ambulance service claims that it takes on the average 8.9 minutes to reach its destination in emergency calls. To check on this claim, the agency which licenses ambulance service has them timed on...

An ambulance service claims that it takes on the average 8.9 minutes to
reach its destination in emergency calls. To check on this claim, the agency
which licenses ambulance service has them timed on 50 emergency calls,
getting a mean of 9.3 minutes with a standard deviation of 1.6 minutes.
What can they conclude at the level of significance α = 0.05 ?