document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131775>Question 1131775</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Salaries of 43 college graduates who took a statistics course in college have a&#8203; mean, x of $ 61,200. Assuming a standard&#8203; deviation, sigma&#8203;, of &#8203;$18,215&#8203;, construct a 90&#8203;% confidence interval for estimating the population mean mu.\r<BR>\n" );
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document.write( "Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #748465 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=748465\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the half-interval width is z*sigma/sqrt(n)<BR>\n" );
document.write( "z for 90% CI is 1.645<BR>\n" );
document.write( "sigma is 18,215, and n is 43<BR>\n" );
document.write( "half-interval is 4569.4, use 4569<BR>\n" );
document.write( "interval is 61200+/-4569<BR>\n" );
document.write( "($56631, $65769) </SPAN>\n" );
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