A researcher investigated the effect of volume of

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Reference no: EM13633754

A researcher investigated the effect of volume of background noise on participants' accuracy rates while performing a difficult task. He tested three groups of randomly selected students and obtained the following means and sums of

squares:

Low Volume Moderate Volume High Volume

X 61.5 65.5 48.25

n 4 5 7

Source Sum of Squares df Mean Square F

Between groups 652.16 _____ _____ _____

Within groups 612.75 _____ _____

Total 1264.92 _____

(a) Complete the ANOVA.

(b) At _ 5 .05, what is Fcrit?

(d) Perform the appropriate post hoc tests.

(e) What do you conclude about this study?

(f) Compute the effect size and interpret it.

Reference no: EM13633754

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