document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=441087>Question 441087</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The question reads:  A university has 10,000 students of which 4,000 are male and 6,000 are female.  If a class of 30 students is chosen at random from the university population, find the mean and standard deviation of the number of male students.\r<BR>\n" );
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document.write( "After using the formula for binomial distribution mean (np) and standard deviation (square root of np(1-p), I came up with the answer...\r<BR>\n" );
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document.write( "mean= 12<BR>\n" );
document.write( "standard deviation = 2.68\r<BR>\n" );
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document.write( "I am confused when to use which equation so I was hoping you could verify my answer.  Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #304556 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=304556\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The question reads: A university has 10,000 students of which 4,000 are male and 6,000 are female. If a class of 30 students is chosen at random from the university population, find the mean and standard deviation of the number of male students.<BR>\n" );
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document.write( "P(male) = 4/10 = 2/5<BR>\n" );
document.write( "n = 30<BR>\n" );
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document.write( "mean = np = (2/5)30 = 12<BR>\n" );
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document.write( "std = sqrt(npq) = sqrt(12*(3/5)) = 2.6833<BR>\n" );
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document.write( "I agree with your answers.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "After using the formula for binomial distribution mean (np) and standard deviation (square root of np(1-p), I came up with the answer... <BR>\n" );
document.write( "mean= 12<BR>\n" );
document.write( "standard deviation = 2.68 <BR>\n" );
document.write( "I am confused when to use which equation so I was hoping you could verify my answer. </SPAN>\n" );
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