# statistics

a random sample from the population of registered voters in california is to be taken and then surveyed about an upcoming election. What sample size should be used to guarantee a sampling error of 3% or less when estimating p at the 95% confidence level?

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1. n = (za/2) ^2 * .25/ E^2
n = (1.96)^2 * .25/.03^2
n = .9604/.0009
n = 1068

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posted by Kuai

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