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Unformatted text preview: survey. Experimental studies-a variable of interest is first identified. Then one or more other variables are identified and controlled so that more informative data can be obtained about the variable of interest. cross-sectional data- data collected at the same or approximately the same point in time, for example, data detailing the number of building permits issued in june 2010 in each of the counties of California. Time series data- data collected over several time periods. Graphs of time series data are frequently found in business publications. Such graphs help analysts understand what happened in the past, identify any trends over time, and project future...
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This note was uploaded on 09/13/2011 for the course STATS 10 taught by Professor Christou during the Spring '11 term at UCSD.
- Spring '11