Question

A researcher examined whether the time of day someone exercises affects memory retention in college courses.  Participants were assigned to one of three exercise groups: morning, afternoon, evening, and their performance on a memorization task was measured.  This data is below:

Morning	Afternoon	Evening
6	4	7
7	5	6
8	6	8
5	4	6
6	5	5
Mean = 6.40	Mean = 4.80	Mean = 6.40
s = 1.14	s =.84	s = 1.14

Assuming the researcher wants to know whether the performance was different in these groups (alpha = .05).  What is the Sum of Squares Between (SS_B)?  Round to two decimal places.

Answer 1

Solution:

Install analysis tool pack in excel and then perform one way ANOVA

data >data analysis>anova single factor

You get

Anova: Single Factor
SUMMARY
Groups	Count	Sum	Average	Variance
Morning	5	32	6.4	1.3
Afternoon	5	24	4.8	0.7
Evening	5	32	6.4	1.3
ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	8.533333	2	4.266667	3.878788	0.050198	3.885294
Within Groups	13.2	12	1.1
Total	21.73333	14

Sum of Squares Between ,SSB=8.53