SCENARIO 18-2
a Political Pollster Randomly Selects a Sample of 100

question 104

Multiple Choice

SCENARIO 18-2
A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks
how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the
percentage favoring the incumbent candidate is too erratic. $$\begin{array} { c c } \begin{array} { c } \text { Sample } \\\underline{\text { (Day) }}\end{array} & \begin{array} { c } \text { Number Favoring } \\\underline{\text { Incumbent Candidate }}\end{array} \\ 1 & 57 \\2 & 57 \\3 & 53 \\4 & 51 \\5 & 55 \\6 & 60 \\7 & 56 \\8 & 59\end{array}$$
-Referring to Scenario 18-2, what is the numerical value of the center line for the p chart?

• A) 0.53
• B) 0.56
• C) 0.63
• D) 0.66

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