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A confidence interval with a 95% confidence level for the proportion of voters who are in favor of the proposition in a referendum is (0.71,
A confidence interval with a 95% confidence level for the proportion of voters who are in favor of the proposition in a referendum is (0.71, 0.77). How many persons were surveyed in this poll?
a | 644 |
b | 685 |
c | 740 |
d | 822 |
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