Chapter 20
Top Ten Statistical Formulas
IN THIS CHAPTER
Breaking down the most commonly used statistical formulas
Practicing the calculations
Understanding the properties and behavior of these formulas
Checking your answers and avoiding common mistakes
This chapter reviews my top ten statistical formulas and the steps and tips for calculating them. I provide a nice last-minute review/refresher to see what you remember and to show you what you need to spend a little more time on. You also get some tips to help you check your answers and to let you know what to expect your results to look like and why.
Mean (or Average)
The mean, or the average of a data set, is one way to measure the center of a numerical data set. The notation for the mean is 
. The formula for the mean is 
, where x represents each of the values in the data set.
To calculate the mean, you
- Add up all the numbers in ...
Get Statistics Workbook For Dummies with Online Practice, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
