Introduction To Statical Theory : Data Presentation (Solution)
LEARNING OUTCOMES At the end of this module, you will be able to: produce and interpret frequency distribution tables; produce and interpret graphs *********************************************************** FREQUENCY DISTRIBUTION: Data can be presented in various forms depending on the type of data collected. A frequency distribution is a table showing how often each value (or set of values) of the variable in question occurs in a data set. A frequency table is used to summarize categorical or numerical data. Frequencies are also presented as relative frequencies, that is, the percentage of the total number in the sample. EXAMPLE : Frequency distribution of peptic ulcer according to site of ulcer Site of ulcer Frequency Percent Gastric ulcer 24 30.0 Duodenal ulcer 50 62.5 Gastric and duodenal ulcer 6 7.5 TOTAL 80 100 GRAPHICAL METHODS: Frequency distributions and are usually illustrated graphically by plotting various type...
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