a. Select a group member’s post and reply by stating the Type I and Type II error for that scenario.

b. State whether their hypothesis is directional or non-directional.

A researcher is interested in studying whether piano music can improve quality of sleep. She recruits two groups of ten college students (5 men & 5 women) with the same ages: Group 1 sleeps with piano music each night for 2 weeks and Group 2 does not sleep with piano music for the same amount of time as Group 1. She compares the sleep quality of Group 1 and Group 2 at the end of the two weeks and expects the sleep quality to improve in the group that listened to the piano music. 


If a group of college students listen to piano music while they fall asleep for two weeks, then their quality of sleep will improve.