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Unformatted text preview: 09-05-07 Introduction to Statistics Notes Ch. 1- 1, 1-2-with two degrees of separation, the target person is not counted-concept of 6 degrees of separation: 1967 study by psychologist Stanley Milgram found that two random residents in the United States are connected by an average of six intermediaries-the method used to collect sample data can make or break the validity of conclusions based on the data-you can learn about a large group be examining data from some of its members-cannot complete census studies because it is impossible to reach the entire population of the country-it’s extremely critical to obtain sample data that are representative of the population from which the data are drawn-sample data must be collected in an appropriate way, such as through random selection or else they will be useless-the word statistics is derived from the Latin word status meaning “state”-early uses of statistics involved complications of data and graphs describing various aspects of a state or country-statistics is largely about using sample data to make inferences, or generalizations, about a whole...
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This note was uploaded on 04/17/2008 for the course MATH unknown taught by Professor Sapko during the Fall '08 term at Mass Colleges.
- Fall '08