Testing claim that opinion is independent of brand

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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

83

231

Unsatisfactory

18

9

6

33

Total

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

Reference no: EM1318535

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