Scenario 12-6
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.
-True or False: Referring to Scenario 12-6, there is sufficient evidence to conclude that the
proportions between year 2 and year 3 are different at a 0.05 level of significance.

Question

Scenario 12-6
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. 
-True or False: Referring to Scenario 12-6, there is sufficient evidence to conclude that the
proportions between year 2 and year 3 are different at a 0.05 level of significance.

Quizplus · Accepted Answer

The p-value for the chi-square test is 0.049, which is less than the significance level of 0.05. Therefore, we can conclude that there is sufficient evidence to reject the null hypothesis and conclude that the proportions between year 2 and year 3 are different.

Scenario 12-6 According to an Article in Marketing News, Fewer Checks Are