LIR 832 - SPRING 2007 Lecture 1

LIR 832 - SPRING 2007 Lecture 1 - Statistics: An...

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Statistics: An Introduction LIR 832 Class #1 January 8, 2007
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Topics of the Day 1. Some really nice pictures (graphical display of quantitative data and more) 2. Why do we teach statistics other than to make your life miserable for a semester? 3. What is in it for me as a future HR/LR practitioner? 4. Fundamental issues in statistics (what really matters) 5. The structure of the course
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The Use of Statistics: Classic Examples Tufte: The Visual Display of Quantitative Information “For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled” (Richard Feynman’s conclusion on the explosion of the space shuttle).
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The Use of Statistics: Classic Examples Data map: John Snow (1854) – deaths from cholera in Central London: Before knowledge of bacterial sources of illness (Holmes father in 1847; Louis Pasteur later on). Deaths are dots; x’s are water pumps; Deaths are clustered around the Broad St. Pump Removal of handle ended an epidemic which killed more than 500
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The Use of Statistics: Classic Examples Data map: National cancer rates by county From darkest (in highest decile of cancer rates) to lightest (lower than US as a whole). High death rates from cancer in the northeast part of the country and around the Great Lakes (High levels of air pollution and dense concentration of industry). Low rates in an east-west band across the middle of the country. Higher rates for men than for women in the south, particularly Louisiana (cancers likely caused by occupational exposure from working with asbestos in shipyards). Can you find the counties which are downwind from the Nevada test range? Can you find the central locations for the chemical industry in the US?
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The Use of Statistics: Classic Examples Data Map: Space and Time - Charles Minard (1861) - Napoleon’s March Width of line varies continuously with size of the army. The line establishes the longitude and latitude of the army. The lines show the direction of movement of the army. The location of the army with respect to certain dates is marked. The temperature along the path of march is marked.
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The Use of Statistics: Classic Examples Computer Graphics: Space and Time Concentration of Pollutants over L.A. July 22, 1979 Two dimensional surface: 6 south California counties Refineries and Kaiser Steel produce post midnight peaks. Traffic and power plants produce daytime peaks Carbon monoxide: Reactive hydrocarbons:
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Classic Examples Election Maps: Difficulty in Portraying Information Accurately and making your point. (http://www‑personal.umich.edu/~mejn/elec
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LIR 832 - SPRING 2007 Lecture 1 - Statistics: An...

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