document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1008936>Question 1008936</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could you please tell me what formula to use to solve this problem?  A study found that the mean migration distance of the green turtle was 2200 kiloeters and the standard deviation was 625 kilometers.  Assume that the distances are normally distributed.  Seventy % of all the distances traveled were greater than how many kilometers?  I would appreciate help with this one. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #624462 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=624462\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A study found that the mean migration distance of the green turtle was 2200 kiloeters and the standard deviation was 625 kilometers. Assume that the distances are normally distributed. Seventy % of all the distances traveled were greater than how many kilometers?<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Sketch a normal curve<BR>\n" );
document.write( "Put 2200 km in the middle (it is the mean)<BR>\n" );
document.write( "Keep in mind the std = 625 km.<BR>\n" );
document.write( "The numbers to the right are greater than the numbers to the left.<BR>\n" );
document.write( "Shade 70% of the area under the curve starting at the right end<BR>\n" );
document.write( "and moving to the left.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Find that left border value in ft.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Since 70% is to the right of the border, 30% is to the left.<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Using a TI-84 calculator the z-value there is invNorm(0.30) = -0.5245<BR>\n" );
document.write( "That means your border is 0.5245 stamdard deviations to the LEFT of the mean.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Ans: 2200-0.5245*625 = 1872.25 ft<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" );