Statistical method selection tool
Step 1. What are you interested in?
| If the mean of a variable is different from a certain fixed value | |
| A confidence interval for the mean | |
| If the mean of a variable in one group is different from the mean in another group | |
| A confidence interval for the difference between two means | |
| If the mean of a variable is different between several groups (three or more different groups) | |
| If the mean of a variable is different between several groups (two or more different groups), controlling for other variables | |
| If the proportion of 'successes' (e.g., proportion of survivors or proportion of people buying a product) is different from a certain fixed value | |
| A confidence interval for the proportion of successes | |
| If the proportion of successes in one group is different from the proportion in another group | |
| A confidence interval for the difference between two proportions | |
| If the proportion of successes is different between several groups (three or more different groups) | |
| If the scores on a variable differ between two groups (more general question than several questions above: we will narrow it down in subsequent steps) | |
| If the scores on a variable differ between three or more groups (more general question than several questions above: we will narrow it down in subsequent steps) | |
| If there is a relationship between two variables | |
| If one variable can predict another variable | |
| If one variable can predict another variable, controlling for other variables | |
| If several variables can predict another variable | |
| If several variables can predict another variable, controlling for other variables |