A study was done that examined the effectiveness of a 7-Minute Screen test for Alzheimer’s disease. The study evaluated the relationship between scores from the 7-Minute Screen and scores for the same patients from a set of cognitive exams that are typically used to test for Alzheimer’s disease. For a sample of n=9 patients, the scores for the 7-Minute Screen averaged M=7 with SS = 92. The cognitive test scores averaged M=17 with SS = 236. For these data, SP = 127.Find the regression equation for predicting the cognitive scores from the 7-Minute Screen score. b =a =Regression equation = What percentage of variance in the cognitive scores is accounted for by the regression equation?r =r2 =Does the regression equation account for a significant portion of te variance in the cognitive scores? Use α = .05 to evaluate the F ratio. MSregression =MSresidual =Fcalculated =Fcritical =Decision =

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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A study was done that examined the effectiveness of a 7-Minute Screen test for Alzheimer’s disease. The study evaluated the relationship between scores from the 7-Minute Screen and scores for the same patients from a set of cognitive exams that are typically used to test for Alzheimer’s disease. For a sample of n=9 patients, the scores for the 7-Minute Screen averaged M=7 with SS = 92. The cognitive test scores averaged M=17 with SS = 236. For these data, SP = 127.

Find the regression equation for predicting the cognitive scores from the 7-Minute Screen score.

b =

a =

Regression equation =

What percentage of variance in the cognitive scores is accounted for by the regression equation?

r =

r² =

Does the regression equation account for a significant portion of te variance in the cognitive scores? Use α = .05 to evaluate the F ratio.

MS_regression =

MS_residual =

F_calculated =

F_critical=

Decision =

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