document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=418363>Question 418363</A>: <I><SPAN STYLE=\"word-break: break-all;\"> continuity corrections. estimate the probability of getting 55 girls in 100 births </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #292815 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=292815\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> continuity corrections. estimate the probability of getting 55 girls in 100 births<BR>\n" );
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document.write( "I guess you are asked to use a normal approximation to this <BR>\n" );
document.write( "binomial probability.<BR>\n" );
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document.write( "Find the z-scores for 54.5 and 55.5 when <BR>\n" );
document.write( "u = np = 100(1/2) = 50<BR>\n" );
document.write( "sigma = sqrt(npq) = sqrt(50(1/2)) = 5<BR>\n" );
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document.write( "z(54.5) = (54.5-50)/5 = 0.9 <BR>\n" );
document.write( "z(55.5) = (55.5-50)/5 = 1.1<BR>\n" );
document.write( "P(x = 55) = P(0.9 <= x <= 1.1) = 0.048394..<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "The binomial answer is 0.048474<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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