A campaign staffer would like to estimate the proportion of likely voters who will vote for a particular candidate in the upcoming election. To help with this estimate, the staffer surveyed a small group of likely voters and found that 80% of the sample supported the candidate. How large a sample should be selected such that the margin of error of the estimate for a 90% confidence interval is at most 5.6%. Round the solution up to the nearest whole number. n = Question Help: Video

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