Question

	M (SD)	SEM	t	df	P value
Doctor’s	4.51 (1.51)	0.150	13.294	412	<0.01
Nurses	6.67 (1.38)	0.078

1. Given the table data, Calculate cohen's d.

2. Explain which version of Cohen’s d that you chose and why.

3. Characterize your calculated value of d as a small, medium, or large effect size.

  

Answer 1

Cohen's d :

We use this formula (using correction factor), because sample size N = 413 is greater than 50.

Since cohen's d is greater than 1, it is large effect size.