document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199970>Question 1199970</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and standard deviation of 10minutes.<BR>\n" );
document.write( "a.) What is the probability of completing the examination in 1hour or less.<BR>\n" );
document.write( "b.) What is the probability that a student will complete the exam in more than 60minutes but less than 75 minutes. <BR>\n" );
document.write( "c.) Assume that the class has 60students and the examination period is 90minutes, how many student do you expect to be unable to complete the exam in the allotted time.<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 #833964 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=833964\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you can use the following calcuator to solve this:<BR>\n" );
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document.write( "the mean is 80 minuts and the standard dviation is 10 minutes.\r<BR>\n" );
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document.write( "a.) What is the probability of completing the examination in 1hour or less.\r<BR>\n" );
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document.write( "the probability is equal to .0228.\r<BR>\n" );
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document.write( "b.) What is the probability that a student will complete the exam in more than 60minutes but less than 75 minutes.\r<BR>\n" );
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document.write( "the probability is .2858.\r<BR>\n" );
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document.write( "c.) Assume that the class has 60students and the examination period is 90minutes, how many student do you expect to be unable to complete the exam in the allotted time.\r<BR>\n" );
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document.write( "the probability is .1587 * 60 = 9.522.<BR>\n" );
document.write( "you would expect the number of students to be equal to 10.\r<BR>\n" );
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document.write( "if you need to know how to do this using z-scores, let me know.<BR>\n" );
document.write( "theo\r<BR>\n" );
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