Instruction 15-7
According to an article in Marketing News, fewer cheques are being written at grocery store checkout stands than in the past. To determine whether there is a difference in the proportion of shoppers who pay by cheque 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.
$$\begin{array} { | l | c | c | c | }
\hline \text { Cheque Written } & \text { Year 1 } & \text { Year 2 } & \text { Year 3 } \
\hline \text { Yes } & 225 & 175 & 125 \
\hline \text { No } & 275 & 175 & 125 \
\hline
\end{array}$$
-Referring to Instruction 15-7,there is not sufficient evidence to conclude that the proportions between year 1 and year 3 are different at a 0.05 level of significance.

Question

Instruction 15-7
According to an article in Marketing News, fewer cheques are being written at grocery store checkout stands than in the past. To determine whether there is a difference in the proportion of shoppers who pay by cheque 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.
 $$\begin{array} { | l | c | c | c | } 
\hline \text { Cheque Written } & \text { Year 1 } & \text { Year 2 } & \text { Year 3 } \
\hline \text { Yes } & 225 & 175 & 125 \
\hline \text { No } & 275 & 175 & 125 \
\hline
\end{array}$$
-Referring to Instruction 15-7,there is not sufficient evidence to conclude that the proportions between year 1 and year 3 are different at a 0.05 level of significance.

Quizplus · Accepted Answer

The data shows a clear decrease in the number of cheques written from Year 1 (225) to Year 3 (125) out of the same total number of shoppers surveyed (500 each year), suggesting a significant difference in the proportions of shoppers who pay by cheque between these years.

Instruction 15-7 According to an Article in Marketing News, Fewer

Instruction 15-7
According to an Article in Marketing News, Fewer