EPPS 2302 Lecture 13: Statistics in Social Sciences
23 Feb 2016
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Document Summary
Descriptive statistics is used to organize and describe characteristics of a collection of data. Inferential statistics is used to make inferences from sample to the population. Can"t ask every person, so sample group is taken. Discrete has restrictions placed on the values it can assume. (whole numbers) Continuous variable is the infinite number of possible values along a real number line. (uses decimals) Average wind speed on top of a mountain. Nominal: characteristics of outcome that fits in only one category (categorical). Interval: tool based on continuum that allows one to talk about how much higher one score is than another. Intervals are equal to each other on scale. There is an arbitrary zero-point (not really of no value or amount like 0 degrees in temperature). How do you know the instrument to collect data works every time (reliable) and measures what it needs to (valid). arbitrary zero-point (not really of no value or amount like 0 degrees in temperature).
