document.write( "Question 993924: The scores on the entrance exam at a well-known, exclusive law school are normally distributed with a mean score of 125 and a standard deviation equal to 46. At what value should the lowest passing score be set if the school wishes only 2.5 percent of those taking the test to pass?\r
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Algebra.Com's Answer #613192 by Theo(13342)\"\" \"About 
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you want a critical z-factor such that less than 2.5% will pass.\r
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\n" ); document.write( "\n" ); document.write( "look up in the z-score table for a z-score that has an area to the left of it of (1 - .025) = .975\r
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\n" ); document.write( "\n" ); document.write( "that z-factor will be your critical z-factor and the value will be 1.96.\r
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\n" ); document.write( "\n" ); document.write( "the formula for z-score is z = (x - m) / s\r
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\n" ); document.write( "\n" ); document.write( "z is the z-score
\n" ); document.write( "x is the raw score
\n" ); document.write( "m is the mean
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\n" ); document.write( "\n" ); document.write( "since you know z and m and s, you can solve for x.\r
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\n" ); document.write( "\n" ); document.write( "formula becomes:\r
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\n" ); document.write( "\n" ); document.write( "1.96 = (x - 125) / 46\r
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\n" ); document.write( "\n" ); document.write( "solve for x to get x = 215.16\r
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\n" ); document.write( "\n" ); document.write( "that's the score they need to pass.\r
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\n" ); document.write( "\n" ); document.write( "here's a picture of what that looks like.\r
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\n" ); document.write( "\n" ); document.write( "the first picture is the z-factor.
\n" ); document.write( "the second picture is the raw score.\r
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\n" ); document.write( "\n" ); document.write( "the area of the normal distribution curve that is covered is shown in the picture and in digits at the bottom.\r
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