The weight of bags of potato chips produced by one machine at a packaging plant has a standard deviation of 0.2 ounces. Suppose samples of 25 bags are drawn from a production run and weighed. What is the standard deviation $\sigma$_x of the mean result?

Question

Quizplus · Accepted Answer

The standard deviation of the mean result, also known as the standard error of the mean, is calculated as the standard deviation of the population (0.2 ounces) divided by the square root of the sample size (25 bags). Thus, the standard error of the mean is 0.2/√25 = 0.04 ounces.

The Weight of Bags of Potato Chips Produced by One σ\sigmaσ

The Weight of Bags of Potato Chips Produced by One $\sigma$