document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=613304>Question 613304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4.  Estimate the mean mathematics ACT score for all statistice students at this college.  Give the 95% confidence interval.\r<BR>\n" );
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document.write( "I have:  E=2.4/64=8/64.64=0.125<BR>\n" );
document.write( "95% confidence interval ranges from 28-0.25=27.75 to 28+0.25=28.25<BR>\n" );
document.write( "27.75 scores <u 28.25 scores </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #385938 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=385938\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistice students at this college. Give the 95% confidence interval. <BR>\n" );
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document.write( "x-bar = 28<BR>\n" );
document.write( "ME = 1.96*4/sqrt(64) = 0.98<BR>\n" );
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document.write( "95% CI: 28-0.98 < u < 28+0.98<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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