document.write( "Question 629193: The math department at a university gives all of the students in a certain math class the same final exam. The scores are normally distributed with a mean of 80 and a standard deviation of 10. What percentage of the students is expected to receive a score of 70 or more? \n" ); document.write( "

Algebra.Com's Answer #396085 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "mean of 80 and a standard deviation of 10
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document.write( "*Note:  in this case z = (70-80)/10
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document.write( " P(x ≥ 70) = 1 - P(z = -1) = 1 -  NORMSDIST(-1) =  1 - .1587 = .8413  0r 84.13%
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document.write( "Note:  One may use a table, calculator or Excel function to find P(z= -1)
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