The average full-sized front-loaded energy star clothes washer uses 15 gallons of water per load. Assume that the population standard deviation for the numbers of gallons of wwater used to washa  load by these machines is 3.0 A. USING EXCEL what is the probability that a random sample of 90 loads washed in a full-sized front-loading Energy Start clothes washer will provide sample mean gallons of water used that is within one-half gallon of the population mean of 15 gallons B. USING EXCEL  What is the probability that a random sample of 50 loads washed in a full-sized front-load Energy Star clothes washer will provide a sample mean gallons of water used that is at least three-quarters of a gallon greater than the population mean of 15 gallons.

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