A researcher investigated the effect of different volumes of background noise on participants’ accuracy rates while performing a difficult task. He tested three groups (n = 11) and obtained thefollowing means: for low volume, X̅ = 66.5; for medium, X̅ = 61.5; for loud, X̅ = 48.25. He computed the following sums of squares:SourceSum of Squaresdf Mean SquareFBetween452.16 Within522.75 Total974.91 Complete the ANOVA summary table.What are H0 and Ha?What is Fcrit?What do you conclude about Fobt?Perform the Tukey HSD test if appropriate.What do you conclude about this relationship?What is the effect size in this study, and what does this tell you about this factor?

Given: SSb = 452.16 SSw = 522.75 SSt = 974.91 N = 3×11 = 33 k = number of groups = 3 n= number of…

Answered: A researcher investigated the effect of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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A researcher investigated the effect of different volumes of background noise on participants’ accuracy rates while performing a difficult task. He tested three groups (n = 11) and obtained the
following means: for low volume, X̅ = 66.5; for medium, X̅ = 61.5; for loud, X̅ = 48.25. He computed the following sums of squares:

Source	Sum of Squares	df	Mean Square	F
Between	452.16
Within	522.75
Total	974.91

Complete the ANOVA summary table.

What are H0 and Ha?

What is Fcrit?

What do you conclude about Fobt?

Perform the Tukey HSD test if appropriate.

What do you conclude about this relationship?

What is the effect size in this study, and what does this tell you about this factor?

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