A Local Group Claims That the Police Issue at Least $\alpha$

question 68

Essay

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 are
listed below. Assume the population standard deviation is 12.2 tickets. At α $\alpha$ = 0.01, test the groupʹs claim. $$\begin{array} { l l l l l l l l l l } 70 & 48 & 41 & 68 & 69 & 55 & 70 & 57 & 60 & 83 \\32 & 60 & 72 & 58 & 88 & 48 & 59 & 60 & 56 & 65 \\66 & 60 & 68 & 42 & 57 & 59 & 49 & 70 & 75 & 63\\44\end{array}$$

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Definitions:

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