A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes.Katelynn took bus number 14 during the peak hour on 18 different occasions with the mean waiting time 7.6 minutes and standard deviation of 2.3 minutes.At the 0.01 significant level, test the claim that the meaning waiting time is less than 10 minutes.Assume this is normal distributed.

Can you show all the step including the excel formula used to solve this problem