A Manager of one restaurant claims that their average number of customers is more than 100 a day. Below are the number of customers recorded for a month. 122, 110, 98, 131, 85, 102, 79, 110, 97, 133, 121, 116, 106, 129, 114, 109, 97, 133, 127, 114, 102, 129, 124, 125, 99, 98, 131, 109, 96, 123, 121.

Test the manager 's claim at 5% significance level by assuming the population standard deviations is 5.