What are some examples of effect size calculations?

What are some examples of effect size calculations?

Effect size calculations help quantify the strength of a relationship or the magnitude of an effect. Common examples include Cohen's d, Pearson's r, and odds ratios.

Can you explain Cohen's d?

Cohen's d measures the difference between two means in terms of standard deviation. It's calculated as the difference between the group means divided by the pooled standard deviation.

How do I interpret a Cohen's d value?

A Cohen's d value of 0.2 is considered small, 0.5 medium, and 0.8 large. It indicates the effect size of the difference between groups.

What about Pearson's r?

Pearson's r measures the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Can you give an example of how to calculate an odds ratio?

Sure! An odds ratio compares the odds of an event occurring in one group to the odds of it occurring in another group. It's calculated using a 2x2 contingency table.