document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=828845>Question 828845</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. What is the probability that a student chosen at random will finish the test in less than 48 minutes?\r<BR>\n" );
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document.write( "Please help !!\r<BR>\n" );
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document.write( "A. 	84% <BR>\n" );
document.write( "B. 	2% <BR>\n" );
document.write( "C. 	34% <BR>\n" );
document.write( "D. 	16% <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #499604 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=499604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "If the student finished at the mean, that means 50% of the students finished in less than 40 minutes and 50% of the students finished greater than 40 minutes.<BR>\n" );
document.write( "Finishing in 48 minutes is the mean plus one standard deviation so the probability is greater than 50%. <BR>\n" );
document.write( "From the answers above, only one answer works. <BR>\n" );
document.write( "Usually it's not that simple.  <BR>\n" );
document.write( "Looking at a normal distribution curve at 1 standard deviation greater than the mean, the cumulative probability is 0.841 or 84.1%.   </SPAN>\n" );
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