Statistical Sciences 1023A/B Study Guide - Quiz Guide: Dependent And Independent Variables, Quartile, Interquartile Range
17 Jan 2018
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Document Summary
Individuals: objects described by a set of data. Variables: any characteristic of an individual, can be quantitative or categorical. Quantitative variable: something that can be counted or measured for each individual **a number. Categorical: something that falls into one of several categories. Distribution: tells us what values it takes and how often it takes these values. Pie charts: used for categorical variables, requires all fractions of the whole. Histograms- gives a visual display of the distribution of quantitative variables by reducing the variable to a categorical one. Symmetric- left and right side are mirror images. Skewed to right- right side of histogram extends farther out. Skewed to left- left side of histogram extends farther out. Stem plot- stem: all but the final digit, leaf: final digit- quick and dirty histograms - quantitative. Time plot- variable plots each observation against the time at which it was measured, time always on horizontal axis over a period of time.
