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113 lines
3.8 KiB
HTML
113 lines
3.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en"><!-- #BeginTemplate "/Templates/Main.dwt" --><!-- DW6 -->
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Relative Frequency</title>
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<header>
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<div id="hdr"></div>
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</header>
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<nav>
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<div id="logo"><a href="../index.html"><img src="../images/style/logo.svg" alt="Math is Fun"></a></div>
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<article id="content" role="main">
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<!-- #BeginEditable "Body" -->
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<h1 class="center">Relative Frequency</h1>
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<p>How often something happens divided by all outcomes.</p>
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<div class="example">
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<p style="float:right; margin: 0 0 5px 10px;"><img src="images/football-match.jpg" alt="Football Match" height="162" width="200"></p>
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<h3>Example: Your team has won 9 games from a total of 12 games played:</h3>
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<ul>
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<li>the Frequency of winning is 9</li>
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<li>the Relative Frequency of winning is 9/12 = 75%</li>
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</ul>
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</div>
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<p>All the Relative Frequencies add up to <span class="larger">1</span> (except for any rounding error).</p>
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<div class="example">
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<p style="float:right; margin: 0 0 5px 10px;"><img src="images/road.jpg" alt="road" height="117" width="200"></p>
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<h3>Example: Travel Survey</h3>
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<p>92 people were asked how they got to work:</p>
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<ul>
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<li>35 used a car</li>
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<li>42 took public transport</li>
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<li>8 rode a bicycle</li>
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<li>7 walked</li>
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</ul>
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<p>The Relative Frequencies (to 2 decimal places) are:</p>
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<ul>
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<li>Car: 35/92 = <b>0.38</b></li>
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<li>Public Transport: 42/92 = <b>0.46</b></li>
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<li>Bicycle: 8/92 = <b>0.09</b></li>
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<li>Walking: 7/92 = <b>0.08</b></li>
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</ul>
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<p class="center larger">0.38+0.46+0.09+0.08 = <b>1.01</b></p>
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<p>(It would be exactly 1 if we had used perfect accuracy)</p>
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</div>
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<p>Try it yourself:</p>
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<div class="script">images/rel-freq-user.js</div>
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<p> </p>
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<div class="questions">1449, 1450, 1451, 1452, 3128, 3129, 3130, 3131, 3786, 3787</div>
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<div class="related">
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<a href="index.html">Data Index</a>
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