SCENARIO 12-6
According to an Article in Marketing News, Fewer

question 100

Multiple Choice

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. $$\begin{array} { | l | c | c | c | } \hline & { \text { Year } } \\\hline \text { Check Written } & \text { Year 1 } & \text { Year 2 } & \text { Year 3 } \\\hline \text { Yes } & 225 & 175 & 125 \\\hline \text { No } & 275 & 325 & 375 \\\hline\end{array}$$
-Referring to Scenario 12-6, what is the form of the null hypothesis?

• A)\(H _ { 0 } : \pi _ { 1 } = \pi _ { 2 } = \pi _ { 3 }\)
• B)\(H _ { 0 } : \pi _ { 1 } = \pi _ { 2 } \neq \pi _ { 3 }\)
• C)\(H _ { 0 } : \pi _ { 1 } \neq \pi _ { 2 } = \pi _ { 3 }\)
• D)\(H _ { 0 } : \pi _ { 1 } \neq \pi _ { 2 } \neq \pi _ { 3 }\)

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