document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=562997>Question 562997</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Finding Mean and Standard Deviation:\r<BR>\n" );
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document.write( "Let the random variable X represent the number of girls in a family of four children.  Construct a table describing the probability distribution, them find the mean and standard deviation.\r<BR>\n" );
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document.write( "Could you help me with this problem please?\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #364751 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=364751\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Finding Mean and Standard Deviation: <BR>\n" );
document.write( "Let the random variable X represent the number of girls in a family of four children. Construct a table describing the probability distribution, them find the mean and standard deviation. <BR>\n" );
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document.write( "0 girls: 1/16<BR>\n" );
document.write( "1 girl : 4/16<BR>\n" );
document.write( "2 girls: 6/16<BR>\n" );
document.write( "3 girls: 4/16<BR>\n" );
document.write( "4 girls: 1/16<BR>\n" );
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document.write( "mean = np = 4*(1/2) = 2<BR>\n" );
document.write( "std = sqrt(npq) = sqrt(4(1/2)(1/2)) = 1<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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