document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=864666>Question 864666</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me figure out how to work this out:<BR>\n" );
document.write( "Find the 0.99 confidence interval for .<BR>\n" );
document.write( "In an effort to compare college costs in State of Michigan, a sample of 36 junior students is randomly selected statewide from the private colleges and 36 more from the public colleges.  The private college sample resulted in a mean of $27,650 and the public college sample mean was $11,360.Assume the annual college fees for private colleges have a mounded distribution and the standard deviation is $1725. Find the 95% confidence interval for the mean costs for private colleges.\r<BR>\n" );
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document.write( "Thanks!\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #521297 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=521297\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In an effort to compare college costs in State of Michigan, a sample of 36 junior students is randomly selected statewide from the private colleges and 36 more from the public colleges. The private college sample resulted in a mean of $27,650 and the public college sample mean was $11,360.Assume the annual college fees for private colleges have a mounded distribution and the standard deviation is $1725. Find the 95% confidence interval for the mean costs for private colleges. \r<BR>\n" );
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document.write( "sample mean:: 27,650<BR>\n" );
document.write( "E = z*s/sqrt(n) = 1.96*1725/sqrt(36) = 563.5<BR>\n" );
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document.write( "95%CI: 27,650-563.5 < u < 27650+563.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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