document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1080207>Question 1080207</A>: <I><SPAN STYLE=\"word-break: break-all;\"> For a group of 10 subjected to a stresssituation, the mean number of heartbeats per minute was 126 and standard deviation was 4. Find 95% confidence interval of the true mean.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #694453 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=694453\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  For a group of 10 subjected to a stress situation, the mean number of heartbeats per minute was 126 and standard deviation was 4. Find 95% confidence interval of the true mean.<BR>\n" );
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document.write( "Sample mean:: 126<BR>\n" );
document.write( "E = z*s/sqrt(n) = 1.96*4/sqrt(10) = 2.4792<BR>\n" );
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document.write( "95% CI: 126- 2.4792 < u < 126 + 2.4792<BR>\n" );
document.write( "95% CI: 123.52 < u < 128.479<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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