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 form of the alternative hypothesis?

A) H₁: $\pi$ ₁ $\neq$ $\pi$ ₂ = $\pi$ ₃
B) H₁: $\pi$ ₁ = $\pi$ ₂ $\neq$$\pi$ ₃
C) H₁: $\pi$ ₁ $\neq$ $\pi$ ₂ $\neq$$\pi$ ₃
D) H₁: not all $\pi$ _j are the same