document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1129714>Question 1129714</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a sample of 500 families, 70 have a yearly income of less than $40,000, 220 have a yearly income of $40,000 to $80,000, and the remaining families have a yearly income of more than $80,000. \r<BR>\n" );
document.write( "\n" );
document.write( "a. Write the frequency distribution table for this problem. <BR>\n" );
document.write( "b. Calculate the relative frequencies for all classes. <BR>\n" );
document.write( "c. Suppose one family is randomly selected from these 500 families. <BR>\n" );
document.write( "d. Find the probability that this family has a yearly income of <BR>\n" );
document.write( "1. less than $40,000 <BR>\n" );
document.write( "2. more than $80,000.<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 #746306 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=746306\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Three classes: under $40,000, between $40T and $80T, and >$80T<BR>\n" );
document.write( "70 in the first, 220 in the second 210 in the third.<BR>\n" );
document.write( "(14%, 44%, 42%)\r<BR>\n" );
document.write( "\n" );
document.write( "less than $40T probability 0.14; greater than $80T probability 0.42 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );