document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=444809>Question 444809</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60. What was the mean score for the 11 female students? <BR>\n" );
document.write( "- What is the mean Score for Female Students is what? and how do you calc this?\r<BR>\n" );
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document.write( "2.A sample of 12 measurements has a mean of 40 and a standard deviation of 3.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. <BR>\n" );
document.write( "-Find the standard deviation of the sample of 14 measurements.\r<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 #306546 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=306546\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60. <BR>\n" );
document.write( "Total student points = 30*73 = 2190<BR>\n" );
document.write( "Total male points = 19*60 = 1140<BR>\n" );
document.write( "What was the mean score for the 11 female students?<BR>\n" );
document.write( "Total female points is (2190-1140) = 1050<BR>\n" );
document.write( "So the mean score for the 11 girls = 1050/11 = 95.45<BR>\n" );
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document.write( "- What is the mean Score for Female Students is what? and how do you calc this? <BR>\n" );
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document.write( "2.A sample of 12 measurements has a mean of 40 and a standard deviation of 3.5.<BR>\n" );
document.write( "Total points = 12*40 = 480<BR>\n" );
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document.write( "Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 40 each.<BR>\n" );
document.write( "Total points is now 1320 with mean = 40<BR>\n" );
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document.write( "-Find the standard deviation of the sample of 14 measurements.<BR>\n" );
document.write( "The spread of the data has not changed because the 2 added number<BR>\n" );
document.write( "values are at the mean.  So new std = 3.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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