With a previous contractor, the mean time to repair a pothole was 3.2 days. A city councilman thinks that the new contractor's mean time to repair a...

With a previous contractor, the mean time to repair a pothole was 3.2 days. A city councilman thinks that the new contractor's mean time to repair a pothole is higher than 3.2 days. he randomly selects a sample of 12 pothole service calls and obtains the following times to repair (in days)

6.2 , 4.3, 7.1, 2.9, 5.4, 3.7, 5.5, 0.7, 7.5, 5.6, 2.6, 1.7

is there enough evidence to support the councilman's claims(use a= 0.05 level of significance). show all the the steps of an appropriate hypothesis test, including finding the value. Assume all conditions are satisfied for your chosen hypothesis test.