document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1056720>Question 1056720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Construct a confidence interval for the population mean given that the sample size is 120, the sample mean is 86.1, and sigma is 17, and the desired confidence is 90%. Choose the correct interval from the following:\r<BR>\n" );
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document.write( "(63.5, 68.7)<BR>\n" );
document.write( "(73.5, 78.7)<BR>\n" );
document.write( "(83.5, 99.7)<BR>\n" );
document.write( "(83.5, 88.7) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #671791 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=671791\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the interval width is z(0.95)*sigma/sqrt(n)<BR>\n" );
document.write( "That is 1.645*17/sqrt(120)=2.55<BR>\n" );
document.write( "The interval is (83.55,88.65) </SPAN>\n" );
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