Other graphic methods of displaying data include the histogram and frequency polygon. The former is a graph showing interval-level or ratio-level data, consisting of contiguous lines or bars of a height corresponding to the number of observations in the interval, and should only be used to display variables when there is an underlying order to the values. Conventionally, intervals that have no observations are included in the histogram, although no lines or bars are printed. Figure 2 is a hypothetical example showing the monthly spending of a group of teenagers attending a summer camp. (The numbers below the bars indicate the middle value or mid-point of each interval.) A variation on this technique is the ‘frequency polygon’, in which the bars are replaced by dots placed above the mid-point of each class interval, and the dots then joined by straight lines.
These and other visual means of presenting data (such as the pie-chart) are normally found where researchers wish to convey the basic information contained in a frequency distribution at a glance or in a simplified form. For this reason they are widely used in media such as magazines and newspapers. See also MEASUREMENT.
"bar chart." A Dictionary of Sociology. . Encyclopedia.com. (May 21, 2018). http://www.encyclopedia.com/social-sciences/dictionaries-thesauruses-pictures-and-press-releases/bar-chart
"bar chart." A Dictionary of Sociology. . Retrieved May 21, 2018 from Encyclopedia.com: http://www.encyclopedia.com/social-sciences/dictionaries-thesauruses-pictures-and-press-releases/bar-chart
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bar chart • n. another term for bar graph.
"bar chart." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (May 21, 2018). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/bar-chart
"bar chart." The Oxford Pocket Dictionary of Current English. . Retrieved May 21, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/bar-chart