To help make a decision about expansion plans, the director of a music company needs to know how many CDs teenagers buy

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answerhappygod
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To help make a decision about expansion plans, the director of a music company needs to know how many CDs teenagers buy

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To help make a decision about expansion plans, the director of a
music company needs to know how many CDs teenagers buy annually. He
believes that the average number of CDs a teenager buys annually is
less than 5. Suppose that he randomly selected 230 teenagers and
asked each to report the number of CDs purchased in the previous 12
months. Do these data provide sufficient evidence at the 4%
significance level to support the director’s belief?
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