Eleven short guides to basic statistical concepts, designed for journalists and others who did not major in math.
Mean: Let's get started.
Median: How to find out how the "average Joe" is doing.
Mode: Who's popular?
Percent: Looking for changes.
Per capita and Rates: When an increase is really a decrease, and other ways people can use numbers to trick you.
Standard Deviation and Normal Distribution: A quick look at the King of Stats.
Survey Sample Sizes and Margin of Error: How not to get suckered by polls and other research.
Regression Analysis: It's all about relationships.
Data Analysis: How to tell if these numbers are really worth writing about anyway.
Statistical Tests: How do I pick the correct statistical test?
Student's T: Is your sample relevant to the larger population it is supposed to represent?
© Robert Niles. Read more in the column archive.