[All Steps] A research team was conducting research about Y, the percentage of voters in favor of a candidate. The random variable Y has standard deviation
Question: A research team was conducting research about \[Y\] , the percentage of voters in favor of a candidate. The random variable \[Y\] has standard deviation \[\sigma =50%\] . A random sample of 900 voters was selected, and their average score was \[{{\bar{y}}_{900}}=42.7%\] . What is the 99% confidence interval for \[E(Y)\] ?
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