PSYC 200W Study Guide - Midterm Guide: Simple Random Sample, Multistage Sampling, Quota Sampling
16 Jan 2019
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Document Summary
Representative sample: one where we can draw accurate, unbiased estimates of the characteristics of the larger population. Sampling frame: list of population from which sample will be drawn. Goal of descriptive research: describe characteristics/behaviors of a given pop in a systematic and accurate fashion provide info about physical, social, behavioral, economic, psychological characteristics of some group of people. Incidents: rate at which new cases of a disease for a disorder occur over a specified period. 95, 97. 5%: graphical methods: presenting data in graph/pictorial. Descriptives table (components, be able to read one: simple frequency distributions: indicates # participants who obtained each score; scores from highest to lowest. Normal vs. positively-skewed vs. negatively skewed distribution. Bar graphs (bars don"t touch: distinct categories -qualitative) vs. histograms (bars touch- reflects data"s continuity quantitative) Confidence intervals: range in which pop mean is likely to fall, conventionally set at 95%, represented graphically as error bars. Z-scores: scores relative to rest of data.
