Stat 5 WebSp2010 - You can join CPS now Study Abroad...

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You can join CPS now Study Abroad http://news.uns.purdue.edu/insidepurdue/2009/090113_StudyAbroad.html show how to get to Canterbury University http://www.canterbury.ac.nz/intstud/studyab/ Art scholarship http://www.purdue.edu/newsroom/academics/2010/100125LasaterSchol
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New Topic—Look at your Workbook notes Gathering data using Statistical Studies The main purpose of a statistical study--- does changing one variable ( the explanatory variable) Cause changes in another variable (the response variable)
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Two basic types of “studies” Observational Studies and Experiments Experiments (Under our control) involve BIG plans about how --- what ---who to measure. Observational studies ( NO CONTROL ) involve measuring life as it is
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Examples—decide whether observational or experiment Vitamin C and colds – Aspirin and heart attacks Does a bright light in the morning work
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Terms used in Experiments 1. Units or individuals 2. Variables ---measurements on the units--two kinds a) response variable b) explanatory variable 3. Treatments
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Why Observational Studies? It may be unethical of impossible to
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Stat 5 WebSp2010 - You can join CPS now Study Abroad...

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