Which of the following is NOT an example of a within-subjects design that would yield data appropriate for a paired-samples t-test? Group of answer choices Males and females are compared to see whether they differ in their depression levels Pretest and posttest scores are obtained from a group of people prior to and after they participate in an intervention Identical twins are compared to see whether they differ in their temperament Students rate the appropriateness of texting in class and texting while on the phone, and the mean ratings are compared