document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1076940>Question 1076940</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a simple random sample of 19 gas stations in the Atlanta area, the price per gallon of regular gasoline has a mean of $2.12 and a (sample) standard deviation of $0.37. Use this sample data to find a 90% confidence interval for the mean price per gallon of all gas stations in the Atlanta area.\r<BR>\n" );
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document.write( "$___________<&#956;< $___________\r<BR>\n" );
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document.write( "The margin of error for this confidence interval is: $____________ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #691529 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=691529\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> t=1.734, df=18 0.95<BR>\n" );
document.write( "CI is mean +/- 1.734 s/sqrt(n)<BR>\n" );
document.write( "=2.12+/-1.734*0.37/sqrt(19), interval is 0.147, which is margin of error<BR>\n" );
document.write( "($1.97, $2.27) </SPAN>\n" );
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