document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=326271>Question 326271</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The number of times a person blinks was studied for a sample of 35 people.  The sample's average was 47 blinks per minute.  The population standard deviation is 7.8 blinks per minute.  What is the 99% confidence interval for the population average? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #233626 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=233626\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of times a person blinks was studied for a sample of 35 people. The sample's average was 47 blinks per minute. The population standard deviation is 7.8 blinks per minute. What is the 99% confidence interval for the population average?<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "xbar = 47 <BR>\n" );
document.write( "ME = inbT(0.995 with df=34)<BR>\n" );
document.write( "= 2.7284*1.3184 = 3.5972<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "99% CI: 47-3.5972 < u < 47+3.5972<BR>\n" );
document.write( "==========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );