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Chapter 2 Notes (6)

Chapter 2 Notes (6) - ii a Ex 15 Construct a histogram for...

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Unformatted text preview: ii. a Ex 15: Construct a histogram for the data given below. Frequency 2 170-1893 , J 190-2093 210-2293 . : 1m 55:? 3:: 230-249.9_ 2502259.s:3 , ': 170 190 210 230 250 270 Note: The dot plots and stern~and-Ieaf plots are more useful with smail data sets. (It is not feasible to construct dot plots or stem-and-leaf plots for large data sets since they show each and every observation). in contrast, histograms can be used for larger data sets as it is more compact. (it does not display each and every observation). WM One of the purposes of making graphs Is to identify the patterns of data distributions. The following distributions are sometimes common in practice. Unimodai Bimodal Skewed distributions A distribution is 0 Skewed to the left if the left tai! is longer than the right tail 0 skewed to the right if the right tail is longer than the left tail ...
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