e39465ad2f
new file: Files/flashplayer_32_sa.exe
new file: favicon.ico
new file: globe.gif
new file: imgs/download.png
new file: imgs/zuck.jpg
new file: index.html
new file: other.ico
new file: script.js
new file: site.webmanifest
new file: sitemap.html
new file: styles/backround.css
new file: styles/border.css
new file: styles/fonts/Titillium_Web/OFL.txt
new file: styles/fonts/Titillium_Web/TitilliumWeb-Black.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-Bold.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-BoldItalic.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-ExtraLight.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-ExtraLightItalic.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-Italic.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-Light.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-LightItalic.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-Regular.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-SemiBold.ttf
new file: styles/fonts/Titillium_Web/TitilliumWeb-SemiBoldItalic.ttf
new file: styles/fonts/webfontkit-20221027-163353/generator_config.txt
new file: styles/fonts/webfontkit-20221027-163353/specimen_files/grid_12-825-55-15.css
new file: styles/fonts/webfontkit-20221027-163353/specimen_files/specimen_stylesheet.css
new file: styles/fonts/webfontkit-20221027-163353/stylesheet.css
new file: styles/fonts/webfontkit-20221027-163353/titilliumweb-extralight-demo.html
new file: styles/fonts/webfontkit-20221027-163353/titilliumweb-extralight-webfont.woff
new file: styles/fonts/webfontkit-20221027-163353/titilliumweb-extralight-webfont.woff2
new file: styles/fonts/webfontkit-20221027-165950/generator_config.txt
new file: styles/fonts/webfontkit-20221027-165950/specimen_files/grid_12-825-55-15.css
new file: styles/fonts/webfontkit-20221027-165950/specimen_files/specimen_stylesheet.css
new file: styles/fonts/webfontkit-20221027-165950/stylesheet.css
new file: styles/fonts/webfontkit-20221027-165950/titilliumweb-bold-demo.html
new file: styles/fonts/webfontkit-20221027-165950/titilliumweb-bold-webfont.woff
new file: styles/fonts/webfontkit-20221027-165950/titilliumweb-bold-webfont.woff2
new file: styles/style.css
new file: tools/2048/.gitignore
new file: tools/2048/.jshintrc
new file: tools/2048/CONTRIBUTING.md
new file: tools/2048/LICENSE.txt
new file: tools/2048/README.md
new file: tools/2048/Rakefile
new file: tools/2048/favicon.ico
new file: tools/2048/index.html
new file: tools/2048/js/animframe_polyfill.js
new file: tools/2048/js/application.js
new file: tools/2048/js/bind_polyfill.js
new file: tools/2048/js/classlist_polyfill.js
new file: tools/2048/js/game_manager.js
new file: tools/2048/js/grid.js
new file: tools/2048/js/html_actuator.js
new file: tools/2048/js/keyboard_input_manager.js
new file: tools/2048/js/local_storage_manager.js
new file: tools/2048/js/tile.js
new file: tools/2048/meta/apple-touch-icon.png
new file: tools/webretro/cores/neocd_libretro.js
new file: tools/webretro/cores/neocd_libretro.wasm
new file: tools/webretro/cores/nestopia_libretro.js
new file: tools/webretro/cores/nestopia_libretro.wasm
new file: tools/webretro/cores/o2em_libretro.js
new file: tools/webretro/cores/o2em_libretro.wasm
new file: tools/webretro/cores/opera_libretro.js
new file: tools/webretro/cores/opera_libretro.wasm
174 lines
7.2 KiB
HTML
174 lines
7.2 KiB
HTML
<!doctype html>
|
|
<html lang="en"><!-- #BeginTemplate "../Templates/Main.dwt" --><!-- DW6 -->
|
|
|
|
<!-- Mirrored from www.mathsisfun.com/data/histograms.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 00:41:41 GMT -->
|
|
<head>
|
|
<meta http-equiv="content-type" content="text/html; charset=utf-8">
|
|
<!-- #BeginEditable "doctitle" -->
|
|
<title>Histograms</title>
|
|
<meta name="description" content="A graphical display of data using bars of different heights" />
|
|
|
|
<script>reSpell=[["centimeters","centimetres"],["favorite","favourite"]];</script>
|
|
|
|
<!-- #EndEditable -->
|
|
<meta name="keywords" content="math, maths, mathematics, school, homework, education">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
|
|
<meta name="HandheldFriendly" content="true">
|
|
<meta name="referrer" content="always">
|
|
<link rel="stylesheet" type="text/css" href="../style3.css">
|
|
<script src="../main3.js"></script>
|
|
</head>
|
|
|
|
<body id="bodybg">
|
|
<div class="bg">
|
|
<div id="stt"></div>
|
|
<header>
|
|
<div id="hdr"></div>
|
|
<div id="logo"><a href="../index.html"><img src="../images/style/logo.svg" alt="Math is Fun"></a></div>
|
|
<div id="gtran">
|
|
<script>document.write(getTrans());</script>
|
|
</div>
|
|
<div id="adTopOuter" class="centerfull noprint">
|
|
<div id="adTop">
|
|
<script>document.write(getAdTop());</script>
|
|
</div>
|
|
</div>
|
|
<div id="adHide">
|
|
<div id="showAds1"><a href="javascript:showAds()">Show Ads</a></div>
|
|
<div id="hideAds1"><a href="javascript:hideAds()">Hide Ads</a><br>
|
|
<a href="../about-ads.html">About Ads</a></div>
|
|
</div>
|
|
</header>
|
|
<nav>
|
|
<div id="menuWide" class="menu">
|
|
<script>document.write(getMenu(0));</script>
|
|
</div>
|
|
<div id="linkto">
|
|
<div id="linktort">
|
|
<script>document.write(getLinks());</script>
|
|
</div>
|
|
</div>
|
|
<div id="search" role="search">
|
|
<script>document.write(getSearch());</script>
|
|
</div>
|
|
<div id="menuSlim" class="menu">
|
|
<script>document.write(getMenu(1));</script>
|
|
</div>
|
|
<div id="menuTiny" class="menu">
|
|
<script>document.write(getMenu(2));</script>
|
|
</div>
|
|
</nav>
|
|
<div id="extra"></div>
|
|
</div>
|
|
<article id="content" role="main"><!-- #BeginEditable "Body" -->
|
|
|
|
<h1 align="center">Histograms</h1>
|
|
<div class="def">
|
|
<p><b>Histogram</b>: a graphical display of data using bars of different heights.</p>
|
|
</div><p> </p>
|
|
<p style="float:left; margin: 0 10px 5px 0;"><img src="images/histogram.gif" alt="Histogram" width="232" height="208" /></p>
|
|
|
|
<p> </p>
|
|
<p>It is similar to a <a href="bar-graphs.html">Bar Chart</a>, but a histogram groups numbers into <b>ranges </b>.</p>
|
|
<p>The height of each bar shows how many fall into each range.</p>
|
|
<p>And you decide what ranges to use!</p>
|
|
<div style="clear:both"></div>
|
|
<div class="example">
|
|
<p style="float:right; margin: 0 0 5px 10px;"><img src="images/orange-orchard.jpg" width="89" height="200" alt="orange orchard" /></p>
|
|
<h3>Example: Height of Orange Trees</h3>
|
|
<p>You measure the height of every tree in the orchard in centimeters (cm)</p>
|
|
<p>The heights vary from 100 cm to 340 cm</p>
|
|
<p>You decide to put the results into groups of 50 cm: </p>
|
|
<ul>
|
|
<li>The <b>100 to just below 150 cm</b> range, </li>
|
|
<li>The <b>150 to just below 200 cm</b> range, </li>
|
|
<li>etc...</li>
|
|
</ul>
|
|
<p>So a tree that is 260 cm tall is added to the "250-300" range. </p><p>And here is the result:</p>
|
|
<p class="center"><img src="images/histogram-heights.svg" alt="histogram heights" /></p>
|
|
<p>You can see (for example) that there are <b>30</b> trees from <b>150 cm to just below 200 cm tall</b> </p>
|
|
<p>(PS: you can create graphs like that using <a href="data-graph.html">Make your own Histogram</a>)</p>
|
|
</div>
|
|
|
|
<p>Notice that the horizontal axis is continuous like a <a href="../number-line.html">number line</a>: <img src="images/histogram-x-axis.svg" alt="histogram x axis" /></p>
|
|
<p> </p>
|
|
<div class="example">
|
|
<p style="float:right; margin: 0 0 5px 10px;"><img src="images/arrow-pup.jpg" width="122" height="200" alt="puppy" /></p>
|
|
<h3>Example: How much is that puppy growing?</h3>
|
|
<p>Each month you measure how much weight your pup has gained and get these results:</p>
|
|
<p class="center"> <b>0.5, 0.5, 0.3, −0.2, 1.6, 0, 0.1, 0.1, 0.6, 0.4</b></p>
|
|
<p>They vary from −0.2 (the pup lost weight that month) to 1.6</p>
|
|
<p>Put in order from lowest to highest weight gain:</p>
|
|
<p class="center"><b>−0.2, 0, 0.1, 0.1, 0.3, 0.4, 0.5, 0.5, 0.6, 1.6</b></p>
|
|
<p>You decide to put the results into groups of 0.5: </p>
|
|
<ul>
|
|
<li>The <b>−0.5 to just below 0</b> range, </li>
|
|
<li>The <b>0 to just below 0.5</b> range, </li>
|
|
<li>etc...</li>
|
|
</ul>
|
|
<p>And here is the result:</p>
|
|
<p class="center"><img src="images/histogram-weight-change.svg" alt="histogram weight change" /></p>
|
|
<p>(There are no values from 1 to just below 1.5,
|
|
but we still show the space.)</p>
|
|
|
|
</div>
|
|
<div class="words">
|
|
<p>The range of each bar is also called the <b>Class Interval</b></p>
|
|
<p>In the example above each class interval is <b>0.5</b></p>
|
|
</div>
|
|
<p> </p>
|
|
<p>Histograms are a great way to show results of <a href="data-discrete-continuous.html">continuous data</a>, such as: </p>
|
|
<ul>
|
|
<li>weight</li>
|
|
<li>height</li>
|
|
<li>how much time</li>
|
|
<li>etc. </li>
|
|
</ul>
|
|
|
|
<p>But when the data is in <b>categories</b> (such as Country or Favorite Movie), we should use a <a href="bar-graphs.html">Bar Chart</a>.</p>
|
|
<p class="center"><img src="images/bar-chart-vs-histogram.svg" alt="bar chart vs histogram" /></p>
|
|
<p> </p>
|
|
<h2>Frequency Histogram</h2>
|
|
<p>A Frequency Histogram is a special graph that uses vertical columns to show frequencies (how many times each score occurs): </p>
|
|
<table border="0" align="center">
|
|
<tr align="center">
|
|
<td><img src="images/frequency-histogram.svg" alt="Frequency Histogram" /></td>
|
|
</tr>
|
|
<tr align="center">
|
|
<td>Here I have added up how often 1 occurs (2 times), <br>
|
|
how often 2 occurs (5 times), etc, <br>
|
|
and shown them as a histogram.</td>
|
|
</tr>
|
|
</table>
|
|
<p> </p>
|
|
|
|
<div class="questions">
|
|
|
|
<script type="text/javascript">getQ(686, 1436, 1438, 1439, 1440, 1441, 3777, 3778, 3779, 3780);</script>
|
|
|
|
</div>
|
|
|
|
<div class="related">
|
|
<a href="data-graph.html">Make your own Histogram</a>
|
|
<a href="bar-graphs.html">Bar Graphs</a>
|
|
<a href="line-graphs.html">Line Graphs</a>
|
|
<a href="pie-charts.html">Pie Charts</a>
|
|
<a href="pictographs.html">Pictographs</a>
|
|
<a href="index.html">Data Index</a>
|
|
</div>
|
|
<!-- #EndEditable --></article>
|
|
<div id="adend" class="centerfull noprint">
|
|
<script>document.write(getAdEnd());</script>
|
|
</div>
|
|
<footer id="footer" class="centerfull noprint">
|
|
<script>document.write(getFooter());</script>
|
|
</footer>
|
|
<div id="copyrt">
|
|
Copyright © 2019 MathsIsFun.com
|
|
</div>
|
|
<script>document.write(getBodyEnd());</script>
|
|
</body>
|
|
<!-- #EndTemplate -->
|
|
<!-- Mirrored from www.mathsisfun.com/data/histograms.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 00:41:43 GMT -->
|
|
</html>
|