document.write( "Question 1177231: An analysis of the grades on the first test in French revealed that they approximate a normal curve with a mean of 75 and a standard deviation of 8. The instructor wants to award the grade of A to the upper 10% of the test grades. What is the dividing point between an A and a B grade? \n" ); document.write( "

Algebra.Com's Answer #805516 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi\r\n" );
document.write( "z= invNorm(.10) = 1.282\r\n" );
document.write( "1.282 = (x-75)/8\r\n" );
document.write( " x = 85.256  \r\n" );
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document.write( " the dividing point between an A and a B grade is 85\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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