Hallam, Price, and Katsarou (2002) investigated theinfluence of background noise on classroomperformance for children aged 10 to 12. In one part ofthe study, calming music led to better performance onan arithmetic task compared to a "no-music" condition.

Suppose that a researcher selects 1 class of n=18students who listen to calming music each day whileworking on arithmetic problems. A second classof n=18 serves as a control group with no music.

Accuracy scores are measured for each child andthe average for students in the music condition isM = 86.4 with SS = 1550 compared to an average ofM = 78.8 with SS = 1204 for students in the "no-music"condition.

Is there a significant difference between the twomusic conditions? Use a two-tailed test with alpha = .05 and df = 30 to find the critical t value (df = 34 is not in the table). Show your work andfollow the four steps for hypothesis testing!