題組內容

4. Young Adult magazine states the hypotheses about the mean age of its subscribers.

Ho: μ=28

Ha: μ≠28

a. (5%) The population standard deviation is assumed known 6 years and the sample size is 100. With a significant level .05, what is the probability of NOT rejecting \( H_{0} \) for \( \mu \) equal to 26?

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