In an Effort to Determine the Average Loaded Weight of Trucks

question 69

Short Answer

In an effort to determine the average loaded weight of trucks leaving a gypsum wallboard plant,a random sample is to be taken.The population standard deviation is 2500 lbs.A 90-percent confidence interval is to be used and the average, $\mu$ ,is to be estimated within 500 pounds.Determine the sample size needed.

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