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The average weight in a sample of 1,200 was 191 pounds and the s =18.2 lbs. Calculate: a) standard error of the sampling distribution of

The average weight in a sample of 1,200 was 191 pounds and the s =18.2 lbs.

Calculate:

a) standard error of the sampling distribution of sample mean weight

b) margin of error for a 95% confidence interval estimate of the population mean weight

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