ECON 2B03 Study Guide - Interquartile Range, Kurtosis, Logical Connective
19 Jan 2014
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Document Summary
Statistics: a branch of mathematics dealing with the collection, presentation, and interpretation of data. Descriptive statistics: describe general characteristics of a set of data. Inferential statistics: draw inferences about (unknown) features of a population based on a (known) sample drawn from a population. Distribution: the values the variable takes and how often/ likely it takes these values. Population: set of all possible observations on some characteristic (e. g. , age, height, income) Random sample: one obtained if every member of the population has an equal chance of being in the sample. Categorical population: a population whose characteristic is inherently non-numerical (e. g. , sex, race) Quantitative population: a population whose characteristic is inherently numerical. Sturgess"s rule: desirable number of classes = k, an integer, where k is the integer closet to (use standard rules for rounding) Class width: the difference between the lower and upper limits of a class. Absolute class frequency: absolute number of observations that fall into a given class.
