According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To determine whether there is a difference in the proportion of shoppers who pay by check among three consecutive years at a 0.05 level of significance, the results of a survey of 500 shoppers in three consecutive years are obtained and presented below. What is the correct conclusion? There is not enough evidence that at least two of the proportions are not equal There is not enough evidence that the proportions are all different in the 3 years There is enough evidence that at least two of the proportions are not equal.
According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To determine whether there is a difference in the proportion of shoppers who pay by check among three consecutive years at a 0.05 level of significance, the results of a survey of 500 shoppers in three consecutive years are obtained and presented below.
What is the correct conclusion?
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There is not enough evidence that at least two of the proportions are not equal |
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There is not enough evidence that the proportions are all different in the 3 years |
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There is enough evidence that at least two of the proportions are not equal.
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There is enough evidence that the proportions are all different in the 3 years.
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