document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204452>Question 204452</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780073048253/algebrahomeworkh>elementary statistics</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> In a Gallup Survey, 90% of the people interviewed were unaware that maintaining a healthy weight could reduce the risk of stroke. If 15 people are selected at random, find the probability that at least 9 are unaware that maintaining a proper weight could reduce the risk of stroke. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154386 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=154386\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a Gallup Survey, 90% of the people interviewed were unaware that maintaining a healthy weight could reduce the risk of stroke. If 15 people are selected at random, find the probability that at least 9 are unaware that maintaining a proper weight could reduce the risk of stroke.<BR>\n" );
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document.write( "It's a binomial problem with n=15, p = 0.9, and 9<=x<=15<BR>\n" );
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document.write( "I used a TI calculator to get:<BR>\n" );
document.write( "P(9<=x<=15) = 1 - binomcdf(15,0.9,8) = 0.999689<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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