document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1095995>Question 1095995</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There are reports of 8.1 cases of typhoid fever per week, on average, in United States. Assuming that the report follows a Poisson distribution, find the probability that there will be between 2 and 4 inclusive cases in the next week.\r<BR>\n" );
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document.write( "So far, I've tried finding the P(4) and P(2), which I found were 0.054443 and 0.009957, respectively. Then I subtracted, P(4) -P(2) and got 0.044486. Am I doing this right? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #710453 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=710453\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Poisson is discrete, so one needs P(2), P(3), and P(4)\r<BR>\n" );
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document.write( "e^(-8.1)*8.1^2/2!=0.001<BR>\n" );
document.write( "e^(-8.1)*8.1^3/6=0.027<BR>\n" );
document.write( "e^(-8.1)*8.1*4/24=0.054<BR>\n" );
document.write( "This equals 0.082 </SPAN>\n" );
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