Hallam, Price, and Katsarou (2002) investigated the influence of background noise on classroom performance for children aged
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Suppose that a researcher selects one class of n = 18 students who listen to calming music each day while working on arithmetic problems. A second class of n = 18 serves as a control group with no music.
Accuracy scores are measured for each child and the average for students in the music condition is M = 86.4 with SS = 1550 compared to an average of M = 78.8 with SS = 1204 for students in the nomusic condition.
a. Is there a significant difference between the two music conditions? Use a two-tailed test with a = .05.
b. Compute the 90% confidence interval for the population mean difference.
c. Write a sentence demonstrating how the results from the hypothesis test and the confidence interval would appear in a research report.
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Related Book For
Essentials Of Statistics For The Behavioral Sciences
ISBN: 9781133956570
8th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
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