Question: 4. Confidence Interval for s Use the same sample data from Exercise 3 to construct a 95% confidence interval estimate of New specifications are being

4. Confidence Interval for s Use the same sample data from Exercise 3 to construct a 95% confidence interval estimate of New specifications are being considered to control the variation of the amounts of coffee that are dispensed. We want almost all of the dispensed amounts to be within 0.5 oz of 12 oz and, using the range rule of thumb, this suggests that the standard deviation should be 0.25 oz. Based on the confidence interval, is 0.25 oz a feasible value of the population standard deviation? Does the machine require modifications to reduce the variation?

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