POLSCI 3NN3 Chapter Notes - Chapter 2: Bar Chart, Flight Controller, Pie Chart
18 Jan 2017
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2. 1 percentages and proportions: percentages convey information in a clear manner, percentages and proportions are a frame of reference, formula 2. 2 (percentage, formula 2. 1 (proportion) (cid:2198)=(cid:2196) (cid:2198)=(cid:2196)(cid:2778)(cid:2777)(cid:2777, = frequecny, or the number of cases in any category. Ex/ a ratio of 2. 49 would be expressed as 249 (249 out of 100 canadians : comparison units. Ex/ a ration of 2. 49 would be expressed as 2. 49:1 (2. 49 canadians to 1. Canadian : in hundreds it would be 249:100, rates used for summarizing distribution of a single variable, rates - the number of actual occurrences of some phenomenon divided by the number of actual occurrences. Assigned reading: (as with ratios) multiplied to eliminate decimals, multiplied by 100,000 when number of actual occurrences of a phenomenon is small compared to the size of the population, (book uses the canadian homicide rate as an example) Nominal-level variables: for each category of the variable: Subtotals: occurrence count, total number of cases (, example.
