A researcher claims that the average age of people who buy lottery tickets is 69. A ...

A researcher claims that the average age of people who buy lottery tickets is 69. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 5. At a = 0.01 is there enough evidence to reject the researchers claim?  
 

49 63 90 52 57 80 72 56 82 56
78 46 70 74 70 61 65 71 80 74
79 76 41 49 62 68 79 67 69 45