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33 Cards in this Set
- Front
- Back
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statistics
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numbers that summarize either distribution of values or the relationships b/w or among variables
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histogram
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bar chart showing distribution of values on a variable
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median
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measure of central tendency for ordinal variables
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mean
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measure of central tendency fo interval variables
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standard score (z)
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measure of location in an interval distribution based on standard deviation units about the mean
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lambda-
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coefficent of association b/w 2 nominal variables
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gamma (G)
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coefficient of association b/w 2 ordinal variables
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scatter diagrams
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graphic summary of distribution of cases on 2 variables, using dots to represent observation
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controlling for 3rd variable
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holding constant the effect of 1 variable on the relationship b/w 2 other variables in order to obtain an accurate measure of that relationship
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model
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simplified representation of reality
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bar chart
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graphic device in which bars are used to represent observations
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contingency question
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filtering device used in survey research to ascertain the appropriateness of asking a subsequent question
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partial regression coefficient
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statisc that indicates the effect of an independent variable on a dependent variable when the effects of all other variables in a model are controlled
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central tendency
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device for determining the value or score that best represents a set of cases on a given variable
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mode
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measure of central tendency for nominal variables
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quantile range
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measure of dispersion for ordinal variables
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standard deviation (s)
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measure of dispersion for interval variables
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univariate statistics
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statistics relating to or describing research subjects
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coefficient of association
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measure of the degree and direction of association b/w 2 variables
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chi- square (x2)
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test of statistical significance of the association b/w 2 nominal variables
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correlation coefficient
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coefficient of association b/w 2 interval variables measuring the cloesemess of fit of dats pts. around the regression line
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regression line
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line that best summarizes the distribution of data pts. on a scatter diagram and the slop of which characterizes the relationship in units of change b/w 2 internal variables
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assocation
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relationship in which 2 or more variables co- vary
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multicollinearity
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condition in which1 or more of the independent varibles in a regression equation are perfect linear function of 1 more more other independent variables in the equation
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pie diagram
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graphic device in which sectored circles are used to represent observations
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dispersion
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indicator of variation around the measure of central tendency, an indicator of its representativeness
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variation ratio
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measure of dispersion for nominal variables
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frequency distribution
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ordered countof the number of cases that take on each value of a variable
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normal distribution
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distribution that is unimodal an symmetrica, with the peak at the center, and in which the mode, median, and mean take on the same value
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bivariate statistics
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statisics summarizing the relationship b/w 2 variables
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multivariate analysis
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statisticlal anlaysis examining the relatioship b/w more than 2 variables simulataneiously
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coefficient of multiple determination (r2)
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multiple regression coefficent tells how much of the variance in the values on a dependent variable is ex;ained by variance in a set of independent variables
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bilateral bar chart
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two directional graphic device in which bars are used to represent variation above or below some norm
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