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Can you explain how to do this? Please show me step by step . I appreciate your time. 1. In a survey of randomly selected

Can you explain how to do this? Please show me step by step . I appreciate your time.

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1. In a survey of randomly selected subjects, the mean age of 256 respondents is 40 years and the standard deviation of the ages 8 years. Use these sample results to construct a 95% confidence interval estimate of the mean age of the population from which the sample was selected

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