2. A late night show is trying to decide which band to invite for their next episode. They want to know if their audience would prefer a K-pop band or a J-pop band. They recruit a sample of 32 audience members. Half (n = 16) listen to several K-pop songs and the other half (n = 16) listen to several J-pop songs. Then participants are given a questionnaire asking how much they like the music. The data are as follows:

J-pop K-pop

M = 17.04 M = 22.19

SS = 90 SS = 270

1. State Null and Alterative Hypothesis

1. Do these data indicate a significant difference between the treatments at the .05 level of significance?

1. Compute r² & Cohen's d to measure the size of the treatment effect.

1. Compute 95% confidence interval

1. Write up the results