Ask someone to tell you how long their commute is, and they can probably provide an average number without much thought. But ...

They have the same average but mean something very different when you are planning your rent or mortgage payments. Situations ...

We also want to know more about the overall shape of our data. Standard deviation is a measure of how spread out a data set is. It's used in a huge number of applications. In finance, standard ...

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 ...

A 1-standard-deviation increase in university teachers’ effectiveness in boosting student performance reduces the students’ evaluations of their professors’ teaching quality by about half of ...

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 ...