document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1071597>Question 1071597</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An insurance company checks police records on 500 randomly selected auto accidents and notes that teenagers were at the wheel in 80 of them. Construct a 95% confidence interval estimate of the proportion of auto accidents that involve teenage drivers. Show all work. Just the answer, without supporting work, will receive no credit. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #686653 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=686653\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An insurance company checks police records on 500 randomly selected auto accidents and notes that teenagers were at the wheel in 80 of them. Construct a 95% confidence interval estimate of the proportion of auto accidents that involve teenage drivers. Show all work. Just the answer, without supporting work, will receive no credit. <BR>\n" );
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document.write( "sample proportion:: 80/500 = 0.16<BR>\n" );
document.write( "ME = 1.96*sqrt[0.16*0.84/500] = 0.0325<BR>\n" );
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document.write( "95%CI:: 0.16-0.0325 < p < 0.16+0.0325<BR>\n" );
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document.write( "95%CI:: 0.1275 < p < 0.1925<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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