document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=338979>Question 338979</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this word problem:<BR>\n" );
document.write( "Professor Bartrich has 184 students in her math class. The scores on the final exam are normally distributed and have a mean of 72.3 and a standard deviation of 8.9. How many students in the class can be expected to receive a score between 82 and 90? </SPAN>\n" );
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document.write( "Professor Bartrich has 184 students in her math class. The scores on the final exam are normally distributed and have a mean of 72.3 and a standard deviation of 8.9. How many students in the class can be expected to receive a score between 82 and 90?<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Find the z-score of 82 and of 90.<BR>\n" );
document.write( "z(82) = (82-72.3)/8.9 = 1.09<BR>\n" );
document.write( "z(90) = (90-72.3)/8.9 = 1.99<BR>\n" );
document.write( "------------------------------------<BR>\n" );
document.write( "P(82<= x <=90) = P(1.09<= z <=1.99) = normalcdf(1.09,1.99) = 0.1146<BR>\n" );
document.write( "=======================================================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );