Sociology 2206A/B Chapter Notes - Chapter 11: Barcode, Precoding, Frequency Distribution
12 Apr 2018
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Frequency distributions: descriptive statistics describe numerical data and can be categorized by univariate, bivariate, or multivariate, the easiest way to describe the numerical data is with frequency distributions, ex. If the frequency distribution forms a "normal" or bell-shaped curve (normal distribution) the. 3 measures of central tendency are equal to one another. Standard deviation =most used, the bigger the standard deviation the bigger the average difference, used to compare: the standard deviation and the mean are used to create z-scores, z-scores compare 2 or more distributions or groups. Results with 2 variables: a bivariate relationship, bivariate stats consider 2 variables together and describe the relationship between them, statistical relationships are based on 2 ideas: correlation and independence, correlation =things that go together. Seeing the relationship: scattergram: a scattergram is a graph on which the researcher plots each case, where each axis represent that value of one variable.
