document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=835747>Question 835747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A recent study by the American Highway Patrolman’s association reveals that 60% of American drivers use their seat belts. A sample of 15 drivers on interstate 75 is selected. <BR>\n" );
document.write( "a. What is the probability that 6 drivers are using seatbelts?<BR>\n" );
document.write( "b. What is the probability that between 5 and 7 (both included) are wearing seat belts? <BR>\n" );
document.write( "c. What is the probability that more than 8 drivers were wearing seat belts?<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 #503695 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=503695\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A recent study by the American Highway Patrolman’s association reveals that 60% of American drivers use their seat belts. A sample of 15 drivers on interstate 75 is selected.<BR>\n" );
document.write( "Binomial Problem with n = 15 and p(use) = 0.60<BR>\n" );
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document.write( "a. What is the probability that 6 drivers are using seatbelts?<BR>\n" );
document.write( "P(x = 6) = 15C6*0.6^6*0.4^9 = binompdf(15,0.6,6) = 0.0612<BR>\n" );
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document.write( "b. What is the probability that between 5 and 7 (both included) are wearing seat belts?<BR>\n" );
document.write( "P(5<= x <=7) = binomcdf(15,0.6,7)-binomcdf(15,0.6,4) = 0.2038<BR>\n" );
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document.write( "c. What is the probability that more than 8 drivers were wearing seat belts?<BR>\n" );
document.write( "P(9<= x <= 15) = 1-binomcdf(15,0.6,8) = 0.6098<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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