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researchers conciusion correct? Explain your answer. 16. In a population, μ 100 and σ,-25. A sample of 150 people has X- 120. Using two tails and the 05 criterion: (a) What is the critical value? (b) Is this sample mean in the region of rejection? How do you know? (c) What does the means loca- tion indicate about the likelihood of this sample occurring in this population? (d) What should we conclude about the sample?

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5 1206 SO 99, 124).

d) From this Confidence interval and Z value we conclude that the sample does not provide sufficient evidence to accept the claim the the true population mean is 100.

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