document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1052544>Question 1052544</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could someone please help me understand this:\r<BR>\n" );
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document.write( "How is the mean square computed from the sum of squares?\r<BR>\n" );
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document.write( "Thanks for the help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #667878 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=667878\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mean Square Total is an estimate of total variance against the grand mean (mean of all samples): (SS_total)/N-1 (note: _total indicates subscript)<BR>\n" );
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document.write( "Mean Square Between groups compare the means of groups to the grand mean: (SS_between)/K-1 If the means across groups are close together this number will be small<BR>\n" );
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document.write( "Mean Square Within groups calculate the variance within each individual group: (SS_within)/N-K<BR>\n" );
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document.write( "Mean Square Between and Mean Square Within are used to calculate the F-ratio: F-ratio = MS_between/MS_within </SPAN>\n" );
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