This confidence interval is based on a simple random sample, Mathematics

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This confidence interval is based on a simple random sample

Working backwards, Part II. A 90% confidence interval for a population mean is (65, 77). The population distribution is approximately normal and the population standard deviation is unknown. This confidence interval is based on a simple random sample of 25 observations. Calculate the sample mean, the margin of error, and the sample standard deviation.

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Mathematics: This confidence interval is based on a simple random sample

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