document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43542>Question 43542</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "I am at a roadblock with this question......Determine the mean and the standard deviation of the folowing frequency distribution\r<BR>\n" );
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document.write( "        Class           Frequency<BR>\n" );
document.write( "         0 to 5             2<BR>\n" );
document.write( "         5 up to 10         7<BR>\n" );
document.write( "         10 up to 15        12<BR>\n" );
document.write( "         15 up to 20         6<BR>\n" );
document.write( "         20 up to 25         3\r<BR>\n" );
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document.write( "Thanks so much for helping me </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28551 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=28551\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I am at a roadblock with this question......Determine the mean and the standard deviation of the folowing frequency distribution <BR>\n" );
document.write( "Class Frequency<BR>\n" );
document.write( "0 to 5 2<BR>\n" );
document.write( "The \"classmark\" is 2.5<BR>\n" );
document.write( "5 up to 10 7<BR>\n" );
document.write( "The \"classmark\" is 7.5<BR>\n" );
document.write( "10 up to 15 12<BR>\n" );
document.write( "The \"classmark\" is 12.5<BR>\n" );
document.write( "15 up to 20 6<BR>\n" );
document.write( "The \"classmark\" is 17.5<BR>\n" );
document.write( "20 up to 25 3<BR>\n" );
document.write( "The classmark is 22.5\r<BR>\n" );
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document.write( "To find the mean, multiply each classmark by its class frequency.<BR>\n" );
document.write( "Then divide by the sum of the frequencies. to get:<BR>\n" );
document.write( "mean = 12.66666...<BR>\n" );
document.write( "Hopefully you know how to calculate the standard deviation.<BR>\n" );
document.write( "standard deviation = 5.331...\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
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