Randy Wants to See Whether Intervention a Is More Effective

Multiple Choice

Randy wants to see whether Intervention A is more effective than Intervention B in improving self-esteem scores.Randy conducts an experiment to see if recipients of Intervention A improve more in self-esteem from pretest to posttest than recipients of Intervention B, using the .05 level of significance.Randy conducts two paired-sample t-Tests and finds a p value of .04 for Intervention A's improvement and a p value of .06 for Intervention B's improvement.Randy then conducts an independent-samples t-Test of the posttest scores and finds a p value of .55.Which of the following statements is an appropriate conclusion from Randy's findings?

A) Intervention A is more effective than Intervention B in improving self-esteem scores.
B) Both interventions are effective in improving self-esteem scores, but Intervention A is more effective.
C) Both interventions are equally effective in improving self-esteem scores.
D) We cannot conclude that either intervention is effective in improving self-esteem scores.