document.write( "Question 1197678: Scores for a particular standardized test are normally distributed with a mean of 80 and
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Algebra.Com's Answer #831051 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Hi\r\n" );
document.write( "Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus\r\n" );
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document.write( "Recommend Using stattrek.com to check Your results until \r\n" );
document.write( "You are comfortable Using Your Calculator.\r\n" );
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document.write( "Normal Distribution: µ = 80 and σ = 14\r\n" );
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document.write( "P(x ≤ 70) = normcdf( -9999, 70, 80, 14) = .2375\r\n" );
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document.write( "P( x ≥  95) = normcdf(95, 9999, 80, 14) = .142\r\n" );
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document.write( "P( 70 ≤ x ≤ 95) =  normcdf(70, 95, 80, 14) = .4148\r\n" );
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document.write( "Percentile score 72%:  z = Invnorm(.72) = .5828\r\n" );
document.write( "  x = 14(.5828) + 80 = 88 rounded \r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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