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Q1) Psychologist would like to study effects of new drug on activity level of animals. 3 samples of rats are chosen with n = 5 in each sample. One group gets no drug, one group gets small dose, and third group gets a large dose. Psychologist records activity level for each animal. Data from this experiment are presented below.
No drug
Small dose
Large dose
5
10
3
12
1
9
G = 90
6
ΣX2 = 678
8
T = 15
T = 30
T = 45
SS = 16
SS = 12
SS = 20
a) Do these data point to any significant differences among three groups? Test with α = .05.-----------------and conclude that drug------------- a significant effect on activity level. b) Calculate η2, the percentage of variance accounted for by treatment.
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