Question: 7.5 Working backwards, Part I. A 95% confidence interval for a population mean, , is given as (18.985, 21.015). This confidence interval is based on

7.5 Working backwards, Part I. A 95% confidence interval for a population mean, , is given as (18.985,

21.015). This confidence interval is based on a simple random sample of 36 observations. Calculate the

sample mean and standard deviation. Assume that all conditions necessary for inference are satised. Use

the t-distribution in any calculations.

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