document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1085498>Question 1085498</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A biologist estimates that 40% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 124 or fewer deer have this tick?<BR>\n" );
document.write( "		<BR>\n" );
document.write( "0.864<BR>\n" );
document.write( "		<BR>\n" );
document.write( "0.702<BR>\n" );
document.write( "		<BR>\n" );
document.write( "0.404<BR>\n" );
document.write( "		<BR>\n" );
document.write( "0.298<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #699589 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=699589\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Expected value is 120<BR>\n" );
document.write( "Can do it by 1 sample proportion (0.4133-0.4)/SE<BR>\n" );
document.write( "std error is sqrt (p*(1-p))/300<BR>\n" );
document.write( "=0.0283<BR>\n" );
document.write( "(0.0133/0.0283)=z<BR>\n" );
document.write( "z=0.47<BR>\n" );
document.write( "probability z < 0.47 is 0.6808<BR>\n" );
document.write( "B<BR>\n" );
document.write( "Can use normal approximation<BR>\n" );
document.write( "mean is 120<BR>\n" );
document.write( "variance is 120*0.6 (np(1-p)=72<BR>\n" );
document.write( "sd is sqrt (72)=8.484<BR>\n" );
document.write( "(124-120)/8.484=0.4714=z<BR>\n" );
document.write( "same answer.<BR>\n" );
document.write( "In this instance want something close to 0.5 and greater than. </SPAN>\n" );
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