STT-2810 Lecture Notes - Lecture 2: Marginal Distribution, Frequency (Statistics), Bar Chart

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5 Feb 2017
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2. 1 summarizing and displaying a single categorical variable. Make a picture, make a picture, make a picture: helps you think clearly about patterns and relationships hidden in the data table, shows the important features of the data, tells others about the data. The area occupied by a part of the graph should correspond to the magnitude of the value it represents. Bars in a bar chart should have equal widths but varying heights. A table whose first column displays each distinct outcome and second column displays that out(cid:272)o(cid:373)e"s f(cid:396)e(cid:395)ue(cid:374)(cid:272)(cid:455) If there are many distinct outcomes, combining them into a few categories is recommended. A table whose first column displays each distinct outcome and second column displays that out(cid:272)o(cid:373)e"s (cid:396)elati(cid:448)e f(cid:396)e(cid:395)ue(cid:374)(cid:272)(cid:455) Similar to frequency table, but displays relative frequencies as a part of the whole rather than frequencies alone. Displays frequency or relative frequency of each category. All bars must have the same width.

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