did they explain the problem correct and give your feed back details

A local group claims that the police issue at least 60 speeding tickets a day in their area.To prove their point, they randomly select one month.Their research yields the number of tickets issued for each day.The data is listed below.Assume the population standard deviation is 12.2 tickets.At = 0.01, test the groups claim.

70484168695570576083

32607258884859605665

66606842575949707563

44

Ho: x is greater than or equal to 60 (claim of the local group)

Ha: x is less than 60

Mean is 60.387097

Standard Deviation is 12.2 tickets

Z= 0.4/12.2/square root (31) = 0.1825

P(z<0.1825)= 0.5724

0.5724>0.01

The claim is correct.