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chapt1sect1 - AP Statistics Bodily exercise when compulsory...

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AP Statistics Bodily exercise, when compulsory, does no harm to the body; but knowledge which is acquired under compulsion obtains no hold on the mind. ----Plato
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Here it comes….. u Your first statistics question: u Is 99 a good number for you? u If it is, stand up.
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Is 99 a good number for you if it’s your…… Bowling score? Golf score? Grade in AP Statistcs? Monthly salary? Hourly salary? In cents? Age?
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So just a number isn’t good enough! We must know what they mean. This is the class that ties the numbers  to an application.
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Statistics (def.) – The science of collecting, organizing, and interpreting numerical facts, which we call data.
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Statistics – why it’s different from your other math classes Based on inductive rather than deductive reasoning. Answers are not made with complete certainty. Clearly writing an explanation of your answer  IN CONTEXT  is  required for most problems.  Actual short essays on tests.                                                  ……what a treat! Common sense is a real asset! Reading the text is strongly advised (when  everyone has one J ). Fewer homework problems – quality not quantity
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Variable (def.) – any characteristic of  a person or thing that can be  expressed as a number or counted
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Data (def.) – the numbers or  information collected in a study or  experiment. The singular is  datum.
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Two forms of data:   quantitative   categorical A rating system of superior, good, average, and poor Times in seconds to run a mile Student test grades ranging from 1 to 100 Heights of people recorded in inches Zip codes Percentages of students in each class who master a  particular skill
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