document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=548423>Question 548423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Empirical rule, I am having difficulty working all the steps. If someone could show each step it would be very helpful.\r<BR>\n" );
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document.write( "At one college GPA's are normally distributed with a mean of 2.8 and a standard deviation of .5. What percentage of students at the college have a GPA between 2.3 and 3.3?\r<BR>\n" );
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document.write( "a)84.13% b)99.74% c) 68.26% d) 95.44%\r<BR>\n" );
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document.write( "I choose answer A, but am not sure how I came up with that answer after working problem.  I have not been in school in 25 years and have never done this kind of math. Any help you provide would be greatly appriciated.\r<BR>\n" );
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document.write( "Wanda Dennis </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #356985 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=356985\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> At one college GPA's are normally distributed with a mean of 2.8 and a standard deviation of .5. What percentage of students at the college have a GPA between 2.3 and 3.3?<BR>\n" );
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document.write( "How far is 2.3 from 2.8? answer is (2.3-2.8) = -0.5<BR>\n" );
document.write( "That means 2.3 is one standard deviation to the left of the mean.<BR>\n" );
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document.write( "How far is 3.3 from 2.8? answer is (3.3-2.8) = 0.5<BR>\n" );
document.write( "That means 3.3 is one standard deviation to the right of the mean.<BR>\n" );
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document.write( "According to the empirical rule 68% of normally distributed <BR>\n" );
document.write( "data is within 1 standard deviation of the mean.<BR>\n" );
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document.write( "So your answer should be \"C\".<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "a)84.13% b)99.74% c) 68.26% d) 95.44% <BR>\n" );
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