Ten Statistical and Graphical Tips and Traps
In This Chapter
Being wary of graphs
Being cautious with regression
Using concepts carefully
The world of statistics is full of pitfalls, but itâs also full of opportunities. Whether youâre a user of statistics or someone who has to interpret them, itâs possible to fall into the pitfalls. Itâs also possible to walk around them. Here are ten tips and traps from the areas of hypothesis testing, regression, correlation, and graphs.
Significant Doesnât Always Mean Important
As I say earlier in the book, âsignificanceâ is, in many ways, a poorly chosen term. When a statistical test yields a significant result, and the decision is to reject H0, that doesnât guarantee that the study behind the data is an important one. Statistics can only help decision making about numbers and inferences about the processes that produced them. They canât make those processes important or earth shattering. Importance is something you have to judge for yourself â and no statistical test can do that for you. ...