document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1205082>Question 1205082</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Anthrax is a disease that broke out in Sinazongwe distric recently. Assume that the bacteria that causes anthrax attacks one in three of the people exposed to it. Assume further that the entire area of Sinazongwe district is exposed to the bacteria. If samples of 70 people of Sinazongwe are taken repeatedly, what would be:<BR>\n" );
document.write( "A. Mean of the sampling distribution of sample proportions? <BR>\n" );
document.write( "B. Standard deviation of the mean of the sampling distribution of sample proportions? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #842333 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=842333\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean is np=70*1/3=23.3 or 23 people.<BR>\n" );
document.write( "variance is np(1-p)=23.3*2/3=15.55 people^2; sd is sqrt of V, note how the units change to something sensible.\r<BR>\n" );
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document.write( "exact is mean 23.3, sd 3.94<BR>\n" );
document.write( "rounded mean 7, sd about 4 </SPAN>\n" );
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