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Q1) Market research study was performed to compare 3 different brands of antiperspirant. Results of study are summarized below. Use a 5% level of significance and test claim that opinion is independent of brand.
Brand
Opinion
A
B
C
Total
Excellent
29
37
50
116
Satisfactory
83
65
231
Unsatisfactory
18
9
6
33
130
111
139
380
1) What is the value of the sample test statistic?
i) x2 =19.00
ii) x2=9.49
iii) F = 0.10
iv) x2=11.91
2) What is your conclusion?
i) Opinion and Brand are independent
ii) Opinion and Brand are not independent
ii) Cannot determine
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