The following data are from an experiment in which researchers hypothesized that Halloween Partying would increase students' statistics lab scores. Students were randomly assigned to either a Halloween Partying (HP) condition or a No Halloween Partying (NHP) condition. Their statistics lab scores were recorded. A) Use =.05 (two tailed), and perform a complete (all four steps) hypothesis test. B) Add an APA journal style summary statement. C) If you were the researcher, would you recommend Halloween Partying to improve statistics lab scores? Explain your answer. D) Find the 95% CI for the difference between the HP and the NHP conditions. For calculating the CI, ROUND OFF the t_crit to the nearest .5. Does the CI make sense, given your decision in part A? Explain.

*************************************************************** The data are presented below:

Statistics Lab Scores NHP: HP: 12 6

16 5

15 8

13 13