Last year, Austin, Texas, had all car maintenance on the city's automobiles done by the city maintenance pool. The cost was $364 per car. This year, the city fired all the workers in the maintenance pool and are using a local business to perform the maintenance. The city would like to know whether the local business is saving them money. A random sample of 36 cars showed a mean repair cost of $330, with a standard deviation of $120.

1. State Ho and Ha
2. Show the math
3. Reject or retain the Ho at a = .05