document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1086694>Question 1086694</A>: <I><SPAN STYLE=\"word-break: break-all;\"> According to a report from the Center for Studying Health System Change, 20% of Americans delay or go without medical care because of concerns about cost (The Wall Street Journal, June 26, 2008). Suppose eight individuals are randomly selected.<BR>\n" );
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document.write( "What is the probability that no more than two will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.)\r<BR>\n" );
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document.write( "What is the probability that at least seven will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.)<BR>\n" );
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document.write( "What is the expected number of individuals who will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.)\r<BR>\n" );
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document.write( "Calculate the variance and the standard deviation for this probability distribution.  (Do not round intermediate calculations. Round your final answers to 4 decimal places.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #700910 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=700910\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> According to a report from the Center for Studying Health System Change, 20% of Americans delay or go without medical care because of concerns about cost (The Wall Street Journal, June 26, 2008). <BR>\n" );
document.write( "Suppose eight individuals are randomly selected.<BR>\n" );
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document.write( "What is the probability that no more than two will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.)<BR>\n" );
document.write( "Binomial Problem with n = 8 and p = 0.2<BR>\n" );
document.write( "P(0<= x <= 1) = binomcdf(8,0.2,1) = 0.5033<BR>\n" );
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document.write( "What is the probability that at least seven will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.)<BR>\n" );
document.write( "P(7<= x <=8) = 1 - binomcdf(8,0.2,6) = 0.00008<BR>\n" );
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document.write( "What is the expected number of individuals who will delay or go without medical care? (Do not round intermediate calculations. Round your final answers to 4 decimal places.) <BR>\n" );
document.write( "E(x) = n*p = 8*0.2 = 1.6<BR>\n" );
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document.write( "Calculate the variance and the standard deviation for this probability distribution. (Do not round intermediate calculations. Round your final answers to 4 decimal places.)<BR>\n" );
document.write( "var(x) = npq = 8*0.2*0.8 = 1.28<BR>\n" );
document.write( "std(x) = sqrt(npq) = sqrt(1.28) = 1.1314<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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