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a manufacture of detergent claims that the mean weight of its boxes is greater than 3...

a manufacture of detergent claims that the mean weight of its boxes is greater than 3 pounds. A sample of its 14 boxes is collected and a mean of 3.238 pounds and a standard deviation of .177 pounds are computed. using the 5% significance level does the evidence support the managers claim?
Math   Statistics-And-Probability   
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