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Let's say you want to construct a 90% confidence interval for the true proportion of voters who support Karol for city treasurer. Previously, it is
Let's say you want to construct a 90% confidence interval for the true proportion of voters who support Karol for city treasurer. Previously, it is estimated that 60% support Karol.
How large does the sample size need to be to guarantee that the margin of error is less than 1%? Assume a p-hat of 0.6.
Note: Round to the nearest integer.
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