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8. Nationally, teenagers work an average of 16 hours per week for pay. The PTA in...

8. Nationally, teenagers work an average of 16 hours per week for pay. The PTA in a certain locale thinks the number locally is higher than that. A random survey of 45 local teenagers is taken, and this sample has a mean of 17.1 hours and a standard deviation of 3.2 hours. At α = 0.025, can the PTA’s claim be supported?

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Q : Can the PTA's claim be supposed?

Answer : Yes

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