Question: A researcher conducts an independent-measures research study and obtains t = \[\text{2}.0\text{7}0\] with df = 28.

a. How many individuals participated in the entire research study?

b. Using a two-tailed test with a = .05, is there a significant difference between the two treatment conditions?

c. Compute r2 to measure the percentage of variance accounted for by the treatment effect.