Statistical Sciences 2141A/B Lecture Notes - Lecture 2: Pareto Chart, Pie Chart, Bar Chart
10 Oct 2018
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Document Summary
Describing/constructing different types of graphs for measurement (quantitative) data. Discussing the shape or the distribution and it"s meanings. Describing/constructing different types of graphs for categorical (qualitative) data. Once a set of data has been collected and organized the next task is to find a way of presenting data (descriptive statistics). A stem-and-leaf plot is a quick way to provide a visual representation of a data set where observations have at least 2 digits. Select one or more leading digits for stem values. Record leaf for every observation beside corresponding stem value. Order the leaves from smallest to largest on each line. Indicate the units for stems and leaves in the display. The data set here was 10, 11, 15, 22, 26, 28, 29, 30, 33, 33, 35, 45, 49, 51. So we divided the 10s and the 1s. Sometimes we can split stems for larger data sets in order to accurately see the distribution.
