document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=356637>Question 356637</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given the following frequency distribution, find the mean, variance, and standard deviation <BR>\n" );
document.write( "error   frequency<BR>\n" );
document.write( "46-48    22<BR>\n" );
document.write( "49-51    23<BR>\n" );
document.write( "52-54    23<BR>\n" );
document.write( "55-57    9<BR>\n" );
document.write( "58-60    7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #254583 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=254583\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Given the following frequency distribution, find the mean, variance, and standard deviation <BR>\n" );
document.write( "error frequency<BR>\n" );
document.write( "46-48 22<BR>\n" );
document.write( "49-51 23<BR>\n" );
document.write( "52-54 23<BR>\n" );
document.write( "55-57 9<BR>\n" );
document.write( "58-60 7<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The mark is the representative value of ALL the numbers in the class<BR>\n" );
document.write( "Find the \"mark\" for each of the classes:<BR>\n" );
document.write( "mark:::frequency<BR>\n" );
document.write( "47:::::22<BR>\n" );
document.write( "50:::::23<BR>\n" );
document.write( "53:::::23<BR>\n" );
document.write( "56:::::9<BR>\n" );
document.write( "58:::::7<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "mean = 51.345...<BR>\n" );
document.write( "std = 3.514..<BR>\n" );
document.write( "variance = 12.348<BR>\n" );
document.write( "============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );