Question 34: Scores on a digit span task were obtained from two groups of 20 participants (40 in total) (2 Points) whose members had been matched for IQ. Scores for one group were obtained following a six-week course on Cognitive Psychology and scores for the other group were obtained following a six-week course on Clinical Psychology. The mean digit spans for the two groups were mCognitive = 9.2 and mclinical = 6.8. What additional information would you need in order to compute the 95% CI around the difference between these two means. the variances for the two groups of scores the standard deviation of the difference scores O a hs O ta/2 Question 35: A researcher chose a random sample of 102 Facebook users from her department's participant pool. She administered the NPI-16 (a short measure of narcissism) to each participant, and she also 24OF re to search O T