Ask someone to tell you how long their commute is, and they can probably provide an average number without much thought. But ask them how much it varies, and they will most likely have to pause and ...

Then he tried calculating the average standard deviation by doing the same thing. He added the three standard deviations and divided them by three to get an average of 5.1. Then he did the ...

While Excel is useful for many applications, it is an indispensable tool for those managing statistics. Two common terms used in statistics are Standard Deviation and ...

So the more spread out the group of numbers are, the higher the standard deviation. A variance is the average of the squared differences from the mean. To figure out the variance, calculate the ...

Investors often use standard deviation to quantify asset volatility. You can calculate standard deviation of an asset in a spreadsheet with a series of daily closing values. Standard deviation ...

How to calculate standard deviation using the defining formula is explained. Discuss with students the need to go beyond averages to give a picture of what a sample is like. Consider real life ...

The size of the data set—the sample size—doesn't affect standard deviation, but the sample size is a key factor in calculating the SEM. A larger random sample will always provide a mean that ...