A researcher conducted a study using 13 rats in a within-subjects design . The t-obtained equaled 3.00. If you used r2 as the measure of effect size, the result would be

Question 23 options:

	r2= 9/14 = .50
	r2= 9/12 = 3/4 = .75
	r2= 9/11 = .8182
	The value of r2 cannot be determined from the information provided.
	r2= 9/21 = .4286