CH 2

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observation

set of values corresponding to a set of variables

frequency distribution

summary of data that shows the number of observations in each of several non-overlapping classes, typically referred to as bins when dealing with distributions

cumulative frequency distribution

variation of the frequency distribution that provides another tabular summary of quantitative data

variation

difference in a variable measured over observations

histogram

common graphical presentation of quantitative data

cross sectional data

data collected from several entities at the same time point in time

time series data

data collected over several time periods


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