document.write( "Question 155311: Given a normally distributed population, find a 95% confidence interval for the population mean;
\n" ); document.write( " sample mean is 119; sample std deviation is 14; sample size is 28\r
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Algebra.Com's Answer #114460 by Fombitz(32388)\"\" \"About 
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Confidence interval given std. deviation and mean is,
\n" ); document.write( "\"x+%2B-+z%2Asigma%2Fsqrt%28n%29\"
\n" ); document.write( "For 95% confidence, \"z=1.96\"
\n" ); document.write( "\"x+%2B-+z%2Asigma%2Fsqrt%28n%29\"
\n" ); document.write( "\"119+%2B-+1.96%2A14%2Fsqrt%2828%29\"
\n" ); document.write( "\"119+%2B-+5.186\"
\n" ); document.write( "(\"113.8\",\"124.2\")
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