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

Multiple Choice

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,what is the correct conclusion?

A) There is enough evidence that at least two of the proportions are not equal.
B) There is not enough evidence that at least two of the proportions are not equal.
C) There is not enough evidence that the proportions are all different in the 3 years.
D) There is enough evidence that the proportions are all different in the 3 years.