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

question 20

Multiple Choice

TABLE 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.
$\begin{array}{cc}\hline\text { Sample }&\text { Number Favoring}\\\text { (Day) }& \text { Incumbent Candidate }\\ \hline1 & 57 \\2 & 57 \\3 & 53 \\4 & 5 1 \\5 & 5 5 \\6 & 6 0 \\7 &5 6 \\8 & 5 9\\\hline\end{array}$

-Referring to Table 18-2, what is the numerical value of the lower control limit for the p chart?

• A) 0.71
• B) 0.41
• C) 0.50
• D) 0.37

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