document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=185747>Question 185747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can someone please help me solve this? thank you so much.\r<BR>\n" );
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document.write( "An insurance company is trying to determine, using the 95% confidence level, what proportion of teenagers have an accident. Using a sample of 582 accidents, the company discovers that teenagers were involved in 91 accidents. What is confidence interval for this proportion?\r<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 #139306 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=139306\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An insurance company is trying to determine, using the 95% confidence level, what proportion of teenagers have an accident. Using a sample of 582 accidents, the company discovers that teenagers were involved in 91 accidents. What is confidence interval for this proportion? \r<BR>\n" );
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document.write( "sample proportion = 91/582 = 0.1564<BR>\n" );
document.write( "Standard error = E = z*sqrt[pq/n] = 1.96sqrt[0.1564*0.8436/582] = 0.0295<BR>\n" );
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document.write( "95% CI: 0.1564 - 0.0295 < p < 0.1564 + 0.0295\r<BR>\n" );
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document.write( "95% CI: 0.1269 < p < 0.1859<BR>\n" );
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document.write( "Do you understand this procedure for constructing confidence intervals?<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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