Answer
At east 983 persons were interviewed in the poll.
Work Step by Step
Here $\hat p = 0.64$, α = 0.05, $z_{0.025} = 1.96$, E = 0.03
$n = 0.64 (1-0.64) (\frac{1.96}{0.03})^{2} = 983.45$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 9 - Section 9.1 - Assess Your Understanding - Applying the Concepts - Page 438: 39
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