document.write( "Question 431046: a population of 5,000 test scores are found to be normally distributed with a mean of 50 and a std. deviation of 10
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Algebra.Com's Answer #299260 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "*Note: 
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document.write( "mean of 50 and a std. deviation of 10
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document.write( " z = -20/10 = -2  and z = 15/10 = 1.5
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document.write( "P(between 30 and 65) = P( -2 > z < 1.5) = .9332 - .0228 = .9104  
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document.write( "91.04% of them are between 30 and 65
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document.write( "Area under the graph between z = -2 and z = 1.5
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