Question 617087
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Hi, 
A researcher claims that the average age of people who buy lottery tickets is 65
Sample mean of the 30 ages is 62.4 and sample SD = 16
z = {{{(62.4 - 65)/(16/sqrt(30))}}}= -.89
Sample size 30, Degree of Freedom 29,  a = 0.05%, (z = -2.05)
NOT enough evidence to reject researcher's claim