A Researcher Collects Data on the Distance Between College Students $\begin{array} { l l l l l l l l l l l l l l l } 25 & 25 & 30 & 30 & 45 & 45 & 55 & 75 & 85 & 110 & 135 & 175 & 195 & 810 & 2170 \end{array}$

question 49

Multiple Choice

A researcher collects data on the distance between college students' high schools and their colleges. He believes that the median distance is 200 miles. A random sample of 15 students yields the following number of miles between their high schools and colleges: $\begin{array} { l l l l l l l l l l l l l l l } 25 & 25 & 30 & 30 & 45 & 45 & 55 & 75 & 85 & 110 & 135 & 175 & 195 & 810 & 2170 \end{array}$
Test the researcher's hypothesis at $\alpha = 0.05$ .
You may use the following abbreviated table of critical values for the sign test (two-tailed $\alpha = 0.05$ ) , taken from Table $J$ in the text:
$\begin{array}{l|ccccccc}\mathbf{n} & \mathbf{1 1} & \mathbf{1 2} & \mathbf{1 3} & \mathbf{1 4} & \mathbf{1 5} & \mathbf{1 6} & \mathbf{1 7} \\\hline \text { critical value } & 1 & 2 & 2 & 3 & 3 & 3 & 4\end{array}$
$\begin{array}{l|cccccccc}\mathbf{n} & \mathbf{1 8} & \mathbf{1 9} & \mathbf{2 0} & \mathbf{2 1} & \mathbf{2 2} & \mathbf{2 3} & \mathbf{2 4} & \mathbf{2 5} \\\hline \text { critical value } & 4 & 4 & 5 & 5 & 5 & 6 & 6 & 6\end{array}$

• A) Reject because the test value 2 is less than the critical value 3 .
• B) Reject because the test value 13 is more than the critical value 3 .
• C) Accept because the test value 4 is less than the critical value 13 .
• D) Accept because the test value 200 is more than the critical value 3 .

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