Statistical Sciences 2037A/B Lecture Notes - Quartile, Unimodality, Standard Deviation
4 Jan 2013
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Document Summary
Chapter 7 summarizing and displaying measurement data. Median the middle number (or average of the two middle numbers) Outlier one or two numbers that are far from the other numbers. Variability tells us how spread out the results are. We find the minimum and the maximum and determine the range. A stemplot is an easy way to organize a list of numbers. They are sometimes called stem and leaf plots or stem and leaf diagrams. They are the first numbers of each number. The leaves are the second number of each number. You can repeat the numbers used for stems to give the picture more meaning. We draw bars for the number of numbers within a range. They are drawn equal to the proportion that they account for. The sum of the bars must reach 100%. A symmetric data set is one that you can draw a line right through and have mirror images on either side.
