document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=485381>Question 485381</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Respected Sir / Mam ,<BR>\n" );
document.write( "Please help me to solve this question. I will be very grateful for your help .<BR>\n" );
document.write( "My question is <BR>\n" );
document.write( "What is the value of the first quartile for observations 15,  <BR>\n" );
document.write( "18,10,20,23,28,12,16 ?<BR>\n" );
document.write( "As the answer given  is : 15.75<BR>\n" );
document.write( "Please provide me the steps for this question.\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #331990 by </B><A HREF=/tutors/aboutme.mpl?userid=deborabr><B>deborabr(181)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=deborabr><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=deborabr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=331990\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> put the numbers in ascending order: 10,12,15,16,18,20,23,28<BR>\n" );
document.write( "use the formula: L=(K/100)N<BR>\n" );
document.write( "where:<BR>\n" );
document.write( "L= the position of the number in the sequence<BR>\n" );
document.write( "K= the quartile (first=25, second=50 and third=75<BR>\n" );
document.write( "here we want to know the first quartile so K=25<BR>\n" );
document.write( "N= the quantity of numbers in the sequence<BR>\n" );
document.write( "and here we have 11 numbers --> 10,12,15,16,18,20,23,28<BR>\n" );
document.write( "substituting we have:<BR>\n" );
document.write( "L=(25/100)11<BR>\n" );
document.write( "L=(25/100)11/1<BR>\n" );
document.write( "L=275/100<BR>\n" );
document.write( "L=2,75<BR>\n" );
document.write( "rounding 2,75 we get 3, is the position of the number in the sequence and the third number is 15. The first quartile is 15 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );