1. Direct Indirect Combination 17.0 16.6 25.2 18.5 22.2 24.0 15.8 20.5 21.5 18.2
ID: 3250669 • Letter: 1
Question
1.
Direct
Indirect
Combination
17.0
16.6
25.2
18.5
22.2
24.0
15.8
20.5
21.5
18.2
18.3
26.8
20.2
24.2
27.5
16.0
19.8
25.8
13.3
21.2
24.2
Anova: Single Factor
SUMMARY
Groups
Count
Sum
Average
Variance
Column 1
7
119
17
5.01
Column 2
7
142.8
20.4
6.2567
Column 3
7
175
25
4.01
ANOVA
Source of Variation
SS
df
MS
F
P-value
F crit
Between Groups
225.68
2
112.84
22.1593
1.39925E-05
3.5546
Within Groups
91.66
18
5.0922
Total
317.34
20
Test for the equality of the population means at the 5% level of significance by the P value method and also by the Critical value method.
Direct
Indirect
Combination
17.0
16.6
25.2
18.5
22.2
24.0
15.8
20.5
21.5
18.2
18.3
26.8
20.2
24.2
27.5
16.0
19.8
25.8
13.3
21.2
24.2
Explanation / Answer
from above as p value is less then 0.05 level and test stat value is higher then critical value; we reject null hypothesis, we reject null hypothesis that all means are equal.
And conclude that at least one group has different means.
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