Keebler Factory weights

An elf at the Keebler factory checks to see that packages of cookies are properly filled by randomly selecting six packages from a box of 50 and weighing them. He makes the following measurements in ounces:
{17, 18, 18, 16, 16, 15}.

What is the standard deviation?

Let xbar be the sample mean.

That is xbar=(17+18+18+16+16+15)/6
(the arithmetic mean)

xbar=100/6=50/3=16.66

The …

The solution addresses the weight in ounces for a package of cookes from Keebler. What is the standard deviation?