ANOVA conclusion PowerPoints

ANOVA conclusion PowerPoints - Analysis of Variance...

Info iconThis preview shows pages 1–6. 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

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

View Full DocumentRight 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: Analysis of Variance Continued October 8, 2007 ANOVA table Source Sum of Squares df Mean square F p eta 2 Between 32 2 16 7.2 <.05 .62 Within 20 9 2.22 Total 52 11 Reporting in APA style F(2,9) = 7.2, p < .05, eta 2 = .62 • Can write out eta 2 or can write η 2 • What can we conclude thus far? There was a significant effect of memory test type on how many words were remembered, F(2,9) = 7.2, p < .05, eta 2 = .62, with a large effect. • So far, all can say • Need to conduct post-hoc tests Post hoc tests • means “after the fact” • do ONLY after reject the null hypothesis that all population means equal • each test compares pair of means, like independent t-test • many possible post-hoc tests; covering two – Tukey’s HSD -- use when have equal ns in each group or SPSS can do it for you – Fisher’s protected t -- use when don’t have equal ns and can’t use SPSS Tukey’s HSD • Will use because have equal ns • Single test - get single value that’s a critical value • Calculates amount any pair of means need to be apart to be significant Absolute value of mean difference needs to be larger...
View Full Document

This note was uploaded on 05/04/2008 for the course PSYCH 207 taught by Professor Wiseman during the Fall '08 term at Allegheny.

Page1 / 22

ANOVA conclusion PowerPoints - Analysis of Variance...

This preview shows document pages 1 - 6. Sign up to view the full document.

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