Question

An educational psychologist is examining response times to an on-screen stimulus. The researcher believes there might be a weak effect from age, but expects a more pronounced effect for different color contrasts. She decides to examine a black on white (B/W) combination compared to 2 alternatives: red on white (R/W) and yellow on blue (Y/B). Here is the data for response times (in milliseconds):

		Color Scheme
		B/W	R/W	Y/B
Age	16–17	10 26 16 22 11 36 31 22	20 19 31 7 43 16 20 23	7 20 33 43 3 22 24 19
	18–19	26 18 25 13 34 15 17 21	17 35 37 39 47 36 15 19	30 30 44 22 35 35 27 22
	20–21	20 29 29 18 23 25 41 26	28 19 25 18 40 30 26 28	16 38 27 25 42 42 35 39

Using MS Excel, conduct a 2-way ANOVA with α=0.05α=0.05. Fill in the summary table:  P-values should be accurate to 4 decimal places and all other values accurate to 3 decimal places.

Source	SS	df	MS	F-ratio	P-value	Partial η2η2
Age (AA)		2
Color (BB)		2
Interaction (A×B)(A×B)		4
Error		63

Answer 1