document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=240385>Question 240385</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Normal distribution<BR>\n" );
document.write( "A mean amount of profit per car sold for a sample of 25 dealers was 290$, with a standard deviation of 100$ Develop a 90% Confidence interval for th epopulation mean?<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 #176128 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=176128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Normal distribution<BR>\n" );
document.write( "A mean amount of profit per car sold for a sample of 25 dealers was 290$, with a standard deviation of 100$ Develop a 90% Confidence interval for th epopulation mean?<BR>\n" );
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document.write( "sample mean: $290<BR>\n" );
document.write( "standard error: 1.645*100/sqrt(25) = 32.9<BR>\n" );
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document.write( "90% CI: 290-32.9 < u < 290+32.9<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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