1 / 6

Statistical Analysis of the Regression Point Displacement Design (RPD)

Statistical Analysis of the Regression Point Displacement Design (RPD). Statistical Requirements. N (n=1) O X O N O O. Pre-post Two groups, but one group has n=1 Dummy-code treatment variable Analysis of Covariance model. RPD Example. 0. 0. 7. 0. 1. 0. 0. 6. Y. 0. 0. 5. 0.

jackwhite
Download Presentation

Statistical Analysis of the Regression Point Displacement Design (RPD)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Statistical Analysis of the Regression Point Displacement Design(RPD)

  2. Statistical Requirements N(n=1) O X O N O O • Pre-post • Two groups, but one group has n=1 • Dummy-code treatment variable • Analysis of Covariance model

  3. RPD Example 0 . 0 7 0 1 0 . 0 6 Y 0 . 0 5 0 . 0 4 0 . 0 3 0 . 0 3 0 . 0 4 0 . 0 5 0 . 0 6 0 . 0 7 0 . 0 8 X

  4. Regression Model for Analysis of Covariance yi = 0 + 1Xi + 2Zi + ei yi = outcome score for the ith unit 0 = coefficient for the intercept 1 = pretest coefficient 2 = mean difference for treatment Xi = covariate Zi = dummy variable for treatment (0 = control, 1= treatment[n=1]) ei = residual for the ith unit where:

  5. RPD Example The regression equation is Y = 0.0120 + 0.784 X - 0.0199 Z Predictor Coef Stdev t-ratio p Constant 0.011956 0.004965 2.41 0.023 X 0.78365 0.09864 7.94 0.000 Z -0.019936 0.005800 -3.44 0.002 s = 0.005689 R-sq = 72.6% R-sq(adj) = 70.6%

  6. RPD Example 0 . 0 7 0 1 0 . 0 6 Y 0 . 0 5 2=-.019936 0 . 0 4 0 . 0 3 0 . 0 3 0 . 0 4 0 . 0 5 0 . 0 6 0 . 0 7 0 . 0 8 X

More Related