A bank branch located in a commercial district of a city has developed an improved process for serving customers during the noon to 1pm lunch period. The waiting time of all customers during this hour is recorded over a period of one week. A random sample of 20 customers is selected, and the results are as follows:

4.215.553.005.154.772.343.543.204.506.10

0.385.126.466.193.794.862.793.655.793.23

At the 0.05 level of significance, is there evidence that the mean waiting time is less than 5 minutes? Would your answer change if the level of significance changes to 0.10 ? Explain answer.