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Proctor & Gamble, a major manufacturer of household products including laundry detergent, estimates that the average household does 25 loads of laundry per month. Random

Proctor & Gamble, a major manufacturer of household products including laundry detergent, estimates that the average household does 25 loads of laundry per month. Random sample of 18 households averaged 22.8 loads per month. Assume the population standard deviation is 6.1 loads per month and the population is normally distributed. A. Construct a 95% confidence interval around the sample mean.


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