Small sample confidence interval for population mean

Reference no: EM13105296

Your quality control department has just analyzed the contents of 20 randomly selected barrels of materials to be used in manufacturing plastic garden equipment. The results found an average of 41.93 gallons of usable material per barrel, with a standard error of 0.040 gallon per barrel. Find the two sided 95% confidence interval for the population mean.

Reference no: EM13105296

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