document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=627160>Question 627160</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The 90% confidence interval for the mean one-way commuting time in New York City is (37.8 minutes, 38.8 minutes).  Determine the margin of error. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #394727 by </B><A HREF=/tutors/aboutme.mpl?userid=reviewermath><B>reviewermath(1029)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=reviewermath><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=reviewermath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=394727\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> get the average of the lower and upper end to get the sample mean.<BR>\n" );
document.write( "sample mean = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2837.8+%2B+38.8%29%2F2 ALIGN=MIDDLE  ALT=\"%2837.8+%2B+38.8%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 38.3<BR>\n" );
document.write( "margin of error = sample mean - lower end = 38.3 - 37.8 = 0.5 or<BR>\n" );
document.write( "margin of error = upper end - sample mean = 38.8 - 38.3 = 0.5<BR>\n" );
document.write( "Answer: 0.5 </SPAN>\n" );
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