The manufacturer of official NFL footballs uses a machine to inflate its new balls to a pressure
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The manufacturer of official NFL footballs uses a machine to inflate its new balls to a pressure of 13.5 pounds. When the machine is properly calibrated, the mean inflation pressure is 13.5 pounds, but uncontrollable factors cause the pressures of individual footballs to vary randomly from about 13.3 to 13.7 pounds. For quality-control purposes, the manufacturer wishes to estimate the mean inflation pressure to within .025 pound of its true value with a 99% confidence interval. What sample size should be used
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Related Book For
Statistics For Business And Economics
ISBN: 9781292227085
13th Global Edition
Authors: Terry Sincich James Mcclave, P. George Benson
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