document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=326553>Question 326553</A>: <I><SPAN STYLE=\"word-break: break-all;\">  <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 #233814 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=233814\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a given year, 24% of the people in a community use the emergency room at the local hospital. A random sample of 26 people is selected. A researcher wishes to know the probability that a fixed number of individuals in the sample will have used the emergeny room in the last year.<BR>\n" );
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document.write( "a) Explain why this situation will involve a binomial probability distribution.<BR>\n" );
document.write( "1. Each individual either has or has not used the emergency room.<BR>\n" );
document.write( "2. The probability for each individual using the emergency is constant.<BR>\n" );
document.write( "3. The events are independent.<BR>\n" );
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document.write( " b) Find the probability that in a sample of 26, exactly 12 people used the emergency room. <BR>\n" );
document.write( "P(x=12) = 26C12*0.24^12*0.76^14 = binompdf(26,0.24,12) = 0.0076<BR>\n" );
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document.write( "c) Find the probability that in a sample of 26, 12 or fewer people used the emergency room.<BR>\n" );
document.write( "P(x<= 12) = binomcdf(26,0.24,12) = 0.9964\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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