document.write( "Question 1193139: family income is believed to be normally distributed with a mean of 25000 and a standard deviation of 10000. if the poverty level is 10000 what percentage of the population lives in poverty \n" ); document.write( "
Algebra.Com's Answer #825138 by Theo(13342)\"\" \"About 
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mean is 25000.
\n" ); document.write( "standard deviation is 10000.
\n" ); document.write( "z = (x - m) / s
\n" ); document.write( "z is the z-score
\n" ); document.write( "x is the poverty level
\n" ); document.write( "m is 25000
\n" ); document.write( "s = 1000
\n" ); document.write( "formula becomes z = (10000 - 25000) / 10000 = -1.5
\n" ); document.write( "area to the left of that z-score is equal to .06680, rounded to 5 decimal places.
\n" ); document.write( "here's what it looks like on a normal distribution graph.\r
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\n" ); document.write( "\n" ); document.write( "the area to the left of 10000 indicates that the probability of getting an income of less than 10000 is equal to .06680 = 6.68%.
\n" ); document.write( "that says that approximately 6.68% of the population is less than the poverty line.\r
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