A market research company was investigating shopping experience at local grocery
ID: 3432680 • Letter: A
Question
A market research company was investigating shopping experience at local grocery stores. Each respondent rated their shopping experience on 0 to 100 point scale, where 0 means very bad experience to 100 means extremely pleasant experience. The number of respondents from Super Fresh, Acme, Giant, and Whole Foods were 8, 7, 6, and 8 respectively. Here is a partial table from Excel output.
a.Complete the ANOVA table
b.What are your hypotheses for the above analysis of variance?
c. At 1% level of significance, what conclusion do you reach regarding shopping experience?
A market research company was investigating shopping experience at local grocery stores. Each respondent rated their shopping experience on 0 to 100 point scale, where 0 means very bad experience to 100 means extremely pleasant experience. The number of respondents from Super Fresh, Acme, Giant, and Whole Foods were 8, 7, 6, and 8 respectively. Here is a partial table from Excel output. a.Complete the ANOVA table b.What are your hypotheses for the above analysis of variance? c. At 1% level of significance, what conclusion do you reach regarding shopping experience?Explanation / Answer
a.Complete the ANOVA table
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b.What are your hypotheses for the above analysis of variance?
Null hypothesis: all means are equal
Alternative hypothesis: at least one mean is different.
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c. At 1% level of significance, what conclusion do you reach regarding shopping experience?
Since the p-value is less than 0.01, we reject the null hypothesis.
So we can conclude that at least one mean is different.
SS df MS F P-value Between Groups 1122.35 5-1=4 1122.35/4=280.5875 280.5875/8.812917=31.83821 0 Within Groups 1333.86-1122.35=211.51 28-4=24 211.51/24=8.812917 Total 1333.86 28Related Questions
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