document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=270107>Question 270107</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a random sample of 26 computers, the mean repair cost was $130 with a sample standard deviation of $36. Assume that the population is normally distributed. \r<BR>\n" );
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document.write( "a.  Find the margin of error for a 95% confidence interval. Round your answer to the nearest hundredths.\r<BR>\n" );
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document.write( "b.	Find a 95% confidence interval for the population mean &#61549;.        </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #197941 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=197941\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In a random sample of 26 computers, the mean repair cost was $130 with a sample standard deviation of $36. Assume that the population is normally distributed. <BR>\n" );
document.write( "a. Find the margin of error for a 95% confidence interval. Round your answer to the nearest hundredths.<BR>\n" );
document.write( "E = 1.96 = 13.84<BR>\n" );
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document.write( "b. Find a 95% confidence interval for the population mean<BR>\n" );
document.write( "CI: 130-13.84 < u < 130+13.84<BR>\n" );
document.write( "CI: 116.16 < u < 143.84<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.  </SPAN>\n" );
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