typeIII - Type III and Type IV Hypotheses Example An...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Type III and Type IV Hypotheses Example An education major wanted to test the efficacy of teaching methods for the division of fractions. Two new methods along with the standard method were studied. Five teachers were trained in all methods and taught a total of twelve classes. Differences in pre- and post-test scores are recorded below: Teacher Method 1 2 3 4 5 A 10 , 7 6 11 6 B 4 5 7 , 8 3 C 13 16 We want to understand Type III and Type IV SS in SAS using this example. We can obtain the contrasts that SAS tests when testing Type III and Type IV SS using the following commands. proc glm; classes teacher method; model diff=method|teacher/e e3 e4; We obtain the following SAS output for the Type III SS contrasts for METHOD: Type III Estimable Functions for: METHOD Effect Coefficients INTERCEPT METHOD a L2 b L3 c-L2-L3 TEACHER 1 2 3 4 5 TEACHER*METHOD 1 a 0.0909*L2-0.2273*L3 1 b-0.0909*L2+0.2273*L3 2 a 0.4545*L2+0.3636*L3 2 c-0.4545*L2-0.3636*L3 3 a 0.3636*L2+0.0909*L3 3 b 0.1818*L2+0.5455*L3 3 c-0.5455*L2-0.6364*L3 1 4 b...
View Full Document

This note was uploaded on 10/01/2009 for the course STAT stat706 taught by Professor Johnm.grego during the Spring '08 term at South Carolina.

Page1 / 4

typeIII - Type III and Type IV Hypotheses Example An...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online