document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1082720>Question 1082720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The following data represent the asking price of a simple random sample of homes for sale. Construct a 99&#8203;% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval.\r<BR>\n" );
document.write( "\n" );
document.write( "&#8203;$223,000<BR>\n" );
document.write( "$279,900<BR>\n" );
document.write( "$19,900<BR>\n" );
document.write( "&#8203;$143,000<BR>\n" );
document.write( "&#8203;$205,800<BR>\n" );
document.write( "&#8203;$181,500<BR>\n" );
document.write( "&#8203;$459,900<BR>\n" );
document.write( "&#8203;$212,000<BR>\n" );
document.write( "&#8203;$187,500<BR>\n" );
document.write( "&#8203;$201,500<BR>\n" );
document.write( "&#8203;$147,800<BR>\n" );
document.write( "&#8203;$264,900 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #696784 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=696784\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean with is $210,558 with s=$102,878<BR>\n" );
document.write( "99%CI is ($118,320, $302,800)<BR>\n" );
document.write( "without the outlier mean is $227,891 with s=$87,618<BR>\n" );
document.write( "99%CI is ($144,170, $311,620)<BR>\n" );
document.write( "This is done using t.995, df=11 * s/sqrt(12) for the first and 1 less in n and df for the second. That is the interval, and it is added to and subtracted from the sample mean.<BR>\n" );
document.write( "The interval is narrower, because the variability is less.  The mean is larger <BR>\n" );
document.write( " because a small number outlier was removed. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );