document.write( "Question 886331: When finding a confidence interval to estimate a population's proportion if the point estimate is 0.420 and the critical value is 1.96 and sample size is 50 then the margin of error (or \"maximum\")is: \n" ); document.write( "

Algebra.Com's Answer #535873 by Theo(13342) $\"\"$ $\"About$

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as best i can determine, your answer will be as follows:\r
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\n" ); document.write( "\n" ); document.write( "p = probability of success
\n" ); document.write( "q = probability of failure
\n" ); document.write( "n = sample size
\n" ); document.write( "sep = standard error of a proportion
\n" ); document.write( "czf = critical z factor
\n" ); document.write( "moe = margin of error
\n" ); document.write( "ci = confidence interval\r
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\n" ); document.write( "\n" ); document.write( "p = .420
\n" ); document.write( "q = 1 - p = .580
\n" ); document.write( "n = 50
\n" ); document.write( "sep = sqrt (p*q/n) = sqrt(.004872) = .0698
\n" ); document.write( "czf = 1.96
\n" ); document.write( "moe = czf * se = 1.96 * .0698 = .1368
\n" ); document.write( "ci = p +/- moe = .420 +/- .1368 = .2832 to .5568\r
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