document.write( "Question 1177123: A random sample of 80 voters found that 56 were going to vote for a certain candidate. Find the 90% confidence interval for the population proportion of voters who will vote for that candidate.
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Algebra.Com's Answer #805375 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "n > 60    x̄ = 56/80 = .7\r\n" );
document.write( "two tailed: 90% confidence interval:  z = 1.645\r\n" );
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document.write( "ME = 1.645*sqrt((.7*.3)/80)) = .0843\r\n" );
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document.write( ".7- ME <  < .7 + ME\r\n" );
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document.write( "CI:  (.62, .78)\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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