document.write( "Question 1085080: in a population distribution, a score of x=28 corresponds to z=-1 and a score of x=34 corresponds to z=-.5 find the mean and standard deviation for the population \n" ); document.write( "

Algebra.Com's Answer #699105 by Fombitz(32388) $\"\"$ $\"About$

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$\"z=%28X-mu%29%2Fsigma\"$
\n" ); document.write( "so
\n" ); document.write( " $\"-1=%2828-mu%29%2Fsigma\"$
\n" ); document.write( "1. $\"28-mu=-sigma\"$
\n" ); document.write( "and
\n" ); document.write( " $\"-0.5=%2834-mu%29%2Fsigma\"$
\n" ); document.write( " $\"-0.5sig%2Ca=34-mu\"$
\n" ); document.write( "2. $\"-sigma=68-2mu\"$
\n" ); document.write( "Substitute from 1,
\n" ); document.write( " $\"28-mu=68-2mu\"$
\n" ); document.write( " $\"mu=68-28\"$
\n" ); document.write( " $\"mu=40\"$
\n" ); document.write( "Now use either equation to solve for $\"sigma\"$ .\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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