1. Sam Sleep researcher hypothesizes that people who are allowed to sleep for only four hours will score significantly lower than people who are allowed to sleep for eight hours on a cognitive skills test. He brings sixteen participants into his sleep lab and randomly assigns them to one of two groups. In one group he has participants sleep for eight hours and in the other group he has them sleep for four. The next morning he administers the SCAT (Sam's Cognitive Ability Test) to all participants. (Scores on the SCAT range from 1-9 with high scores representing better performance). Test his hypothesis. SCAT scores --lI---_ l\"\"\" Solution: a. DV: scores in SCAT IV: People who sleep for 4 hours and 8 hours respectively b. Ho: There is no significant difference in the SCAT scores between people who are allowed to sleep for 4 hours and those who sleep for 8 hours. c. Ha: Ho: There is a significant difference in the SCAT scores between people who are allowed to sleep for 4 hours and those who sleep for 8 hours. 0! 2.05 e. Data Analysis Independent Samples Test t at Sig. (Zwtailed) scoreSCAT Equal variances assumed Equal variances not assumed .847 14 .411 .847 13.553 .412 f. The p-value is greater than 5%. do not reject the null hypothesis. Thus, There is no significant difference in the scores of people who are allowed to sleep for 8 hours compared to those who sleep for 4 hours