document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1160792>Question 1160792</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The following table shows the weight (in kilograms) of 50 sacks of potatoes leaving a<BR>\n" );
document.write( "farm shop.<BR>\n" );
document.write( "10.41 10.06 9.38 11.36 9.65<BR>\n" );
document.write( "11.24 10.58 8.55 10.47 8.22<BR>\n" );
document.write( "9.36 9.63 10.33 10.05 11.57<BR>\n" );
document.write( "11.36 10.82 8.93 10.08 9.53<BR>\n" );
document.write( "10.05 11.30 11.01 9.72 10.67<BR>\n" );
document.write( "9.91 10.26 10.67 10.21 8.18<BR>\n" );
document.write( "8.70 9.49 10.98 10.01 9.92<BR>\n" );
document.write( "9.27 11.69 9.66 9.52 10.40<BR>\n" );
document.write( "10.61 8.83 10.11 10.37 9.73<BR>\n" );
document.write( "10.72 10.63 12.86 10.62 10.26<BR>\n" );
document.write( "Display these data in a stem and leaf plot. Note the number of decimal places and adjust<BR>\n" );
document.write( "accordingly. State clearly both the stem and the leaf units.<BR>\n" );
document.write( "2. A market researcher asked 650 students what their favourite daily newspaper was. The results are summarised in the frequency table below. Represent these data in an appropriate<BR>\n" );
document.write( "graphical manner.<BR>\n" );
document.write( "The Times 140<BR>\n" );
document.write( "The Sun 200<BR>\n" );
document.write( "The Sport 50<BR>\n" );
document.write( "The Guardian 120<BR>\n" );
document.write( "The Financial Times 20<BR>\n" );
document.write( "The Mirror 80<BR>\n" );
document.write( "The Daily Mail 10<BR>\n" );
document.write( "The Independent 30<BR>\n" );
document.write( "3. Produce a histogram for the data on length of mobile phone calls from the exercises in<BR>\n" );
document.write( "Chapter 1 (listed again below) and comment on it.<BR>\n" );
document.write( "281.4 293.4 306.5 286.6 298.4<BR>\n" );
document.write( "312.7 327.7 311.5 314.8 303.3<BR>\n" );
document.write( "270.7 293.9 310.9 346.4 304.6<BR>\n" );
document.write( "304.1 320.7 283.6 337.5 259.6<BR>\n" );
document.write( "305.4 317.9 289.5 286.9 300.5<BR>\n" );
document.write( "278.3 300.1 292.6 312.9 302.5<BR>\n" );
document.write( "293.2 267.5 326.9 257.7 285.9<BR>\n" );
document.write( "299.6 293.9 303.9 323.7 263.5<BR>\n" );
document.write( "281.1 306.9 310.2 301.6 313.9<BR>\n" );
document.write( "314.8 292.0 302.4 267.9 292.0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Consider the following data for daily sales at a small record shop, before and after a local<BR>\n" );
document.write( "radio advertising campaign.<BR>\n" );
document.write( "Daily Sales Before After<BR>\n" );
document.write( "1000 ≤ sales < 2000 10 7<BR>\n" );
document.write( "2000 ≤ sales < 3000 30 10<BR>\n" );
document.write( "3000 ≤ sales < 4000 40 25<BR>\n" );
document.write( "4000 ≤ sales < 5000 20 35<BR>\n" );
document.write( "5000 ≤ sales < 6000 15 37<BR>\n" );
document.write( "6000 ≤ sales < 7000 12 40<BR>\n" );
document.write( "7000 ≤ sales < 8000 10 20<BR>\n" );
document.write( "8000 ≤ sales < 9000 8 10<BR>\n" );
document.write( "9000 ≤ sales < 10000 0 5<BR>\n" );
document.write( "Totals 145 189<BR>\n" );
document.write( "(a) Calculate the percentage relative frequency for before and after.<BR>\n" );
document.write( "(b) Calculate the cumulative percentage relative frequency for before and after.<BR>\n" );
document.write( "(c) Plot the relative frequency polygons for both on one graph and comment.<BR>\n" );
document.write( "(d) Plot the ogives for both on one graph.<BR>\n" );
document.write( "(e) Find the level of sales, before and after, that are reached on 25%, 50% and 75% of<BR>\n" );
document.write( "days.<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 #784186 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=784186\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One question per post please </SPAN>\n" );
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