Question: 95% confidence; n = 25, x = 81.0 mi/h, s = 2.3 mi/h. Use the given confidence level and sample data to find a confidence

95% confidence; n = 25, x = 81.0 mi/h, s = 2.3 mi/h.

Use the given confidence level and sample data to find a confidence interval for the population standard deviation σ. In each case, assume that a simple random sample has been selected from a population that has a normal distribution.

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