document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1193876>Question 1193876</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average retail price of gasoline(all types) for the first half of 2009 was 236.5 cents. What would the standard deviation have to be in order for a 15 % probability that a gallon of gas costs less than 2 dollars. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #826040 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=826040\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=-1.036<BR>\n" );
document.write( "z=(x-mean)/sd<BR>\n" );
document.write( "-1.036<(200-236.5)/sd<BR>\n" );
document.write( "-1.036sd <-36.5<BR>\n" );
document.write( "sd=35.2 cents </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );