There are three main brands of certain powder. A set of its 120 sales is examined and found to be allocated among four groups A, B, C, D and brands I, II, III as shown below: Groups Brands B с D I 4 8 15 II 8 13 6 III 19 11 13 Is there is any significant differences in brands preference at 5% level of significance. A 0 5 18

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5. There are three main brands of certain powder. A set of its 120 sales is examined and
found to be allocated among four groups A, B, C, D and brands I, II, III as shown below:
Groups
Brands
B
C
D
I
4
8
15
II
8
13
6
III
19
11
13
Is there is any significant differences in brands preference at 5% level of significance.
A
0
5
18
Transcribed Image Text:5. There are three main brands of certain powder. A set of its 120 sales is examined and found to be allocated among four groups A, B, C, D and brands I, II, III as shown below: Groups Brands B C D I 4 8 15 II 8 13 6 III 19 11 13 Is there is any significant differences in brands preference at 5% level of significance. A 0 5 18
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