document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1187782>Question 1187782</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An article in the San Jose Mercury News stated that students in the California state university system take 4.8 years, on average with a standard deviation of 1.9, to finish their undergraduate degrees.  Suppose you believe that the mean time is longer. \r<BR>\n" );
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document.write( "You conduct a survey of 72 students and find they have a mean of 5.5 and a standard deviation of 1.8.\r<BR>\n" );
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document.write( "What would be your standard error of the mean (SEM)? Please compute to 4 decimal places. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #819169 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=819169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> SEM is sd/sqrt(n)=1.9/sqrt(72), or 0.2239 years. We know the population sd, so we use that to calculate the SEM of the sample. If we didn't know that, we would have to use the one estimate we have, 1.8 years, from the sample.  </SPAN>\n" );
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