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Grand mean=14.82 Calculate effect size using the formula d=(M-u)/

Grand mean=14.82 Calculate effect size using the formula d=(M-u)/

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Grand mean=14.82

Calculate effect size using the formula d=(M-u)/

Iranian researchers studied factors affecting patients' likelihood of wearing orthodontic appliances, noting that orthodontics is perhaps the area of health care with the highest need for patient cooperation (Behenam & Pooya, 2007). Among their analyses, they compared students in primary school, junior high school, and high school. The data that follow have almost exactly the same means as they found in their study, but with far smaller samples. The score for each student is his or her daily hours of wearing the orthodontic appliance. Groups nk Primary school: 16, 13, 18 Junior high school: 8, 13, 14, 12 High school: 20, 15, 16, 18 Primary school 15.67 6.33 Junior high school 11.75 6.92 High school 17.25 4.92 State research and null hypotheses in words & symbols: The F-distribution shows values of F you would get if you repeatedly drew 3+ samples from one particular population and calculated the ratio of between-groups to within-groups variance. dfpetween = dfwithin dftotal = Determine the critical value and mark it on the distribution to the right. Ferit (dfpetween dfwithin) = 5%
Transcribed Image Text:Iranian researchers studied factors affecting patients' likelihood of wearing orthodontic appliances, noting that orthodontics is perhaps the area of health care with the highest need for patient cooperation (Behenam & Pooya, 2007). Among their analyses, they compared students in primary school, junior high school, and high school. The data that follow have almost exactly the same means as they found in their study, but with far smaller samples. The score for each student is his or her daily hours of wearing the orthodontic appliance. Groups nk Primary school: 16, 13, 18 Junior high school: 8, 13, 14, 12 High school: 20, 15, 16, 18 Primary school 15.67 6.33 Junior high school 11.75 6.92 High school 17.25 4.92 State research and null hypotheses in words & symbols: The F-distribution shows values of F you would get if you repeatedly drew 3+ samples from one particular population and calculated the ratio of between-groups to within-groups variance. dfpetween = dfwithin dftotal = Determine the critical value and mark it on the distribution to the right. Ferit (dfpetween dfwithin) = 5%
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