Question

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5.Why do we need to calculate the subjects sum of squares separately from the within-groups sum of squares?

Select one:

A. We want to remove the variability due to participant differences from our estimate of variability.

B. We want to remove the variability within groups.

C. We want to remove the variability between groups.

D. We want to remove Type I error.

6.

sing the source table provided, calculate the effect size for the interaction.

Table: Coffee and Sleep

Source	SS	df	MS	F
Gender	0.25	1	0.25	0.283
Cups of Coffee	81.556	2	40.778	46.18
Gender × Cups	2.667	2	1.33	1.51
Within	26.5	30	0.883
Total	110.972	35

Select one:

A. 0.091

B. 0.009

C. 0.755

D. 0.053

Compared to a one-way between-groups ANOVA, the effect size calculation for the one-way within-groups ANOVA differs in:

Select one:

8.A. Cohen's guidelines for interpreting the effect size values.

B. its ease of computation.

C. the content of the numerator.

D. that variability due to subjects is removed from total variability in the denominator.

9.

A related-samples t test is used when there are ________ groups, and a within-groups ANOVA is used when there are ________ groups.

Select one:

A. 1; 2

B. 1; 3

C. 2; 3

D. 3; 2

Answer 1

5.Why do we need to calculate the subjects sum of squares separately from the within-groups sum of squares?

A. We want to remove the variability due to participant differences from our estimate of variability.

6.seeing the source table provided, calculate the effect size for the interaction.

A. 0.091

Source	SS or SSeffect	df	MS	F	SSeffect+Within	SSeffect/(SSeffect+Within)
Gender	0.25	1	0.25	0.283	26.75	0.009
Cups of Coffee	81.556	2	40.778	46.18	108.056	0.755
Gender × Cups	2.667	2	1.33	1.51	29.167	0.091
Within	26.5	30	0.883
Total	110.972	35

8. Compared to a one-way between-groups ANOVA, the effect size calculation for the one-way within-groups ANOVA differs in:

D. that variability due to subjects is removed from total variability in the denominator.

9. A related-samples t test is used when there are ________ groups, and a within-groups ANOVA is used when there are ________ groups.

C. 2; 3