document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1121524>Question 1121524</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sixty five percent of 12th graders attend school in a particular urban district. If a sample of 450 12th grade children is selected. \r<BR>\n" );
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document.write( "1.	Find the probability that at least 290 are actually enrolled in the school<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 #737476 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=737476\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find mean and sd of the distribution<BR>\n" );
document.write( "mean=np=450*0.65 or 292.5<BR>\n" );
document.write( "variance is np(1-p) or 292.5*0.35 =102.375<BR>\n" );
document.write( "sd is sqrt (V) or 10.02<BR>\n" );
document.write( "z>(289.5-292.5)/10.02, using continuity correction factor of -0.5 to have z at least 290<BR>\n" );
document.write( "z>-0.2994<BR>\n" );
document.write( "probability is 0.6177 </SPAN>\n" );
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