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11 Cards in this Set
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- Back
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Positive relationship
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A relationship between two variables where increases in one variable tend to be accompanied by increases in the other variable.
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Negative relationship
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A relationship between two variables where increases in one variable tend to be accompanied by decreases in the other variable.
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Perfect relationship
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A relationship where the actual data points perfectly fit the specific form being measured. For a Pearson correlation, the data points fit perfectly on a straight line.
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Sum of products
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A measure of the degree of covariability between two variables; the degree to which they vary together
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Pearson correlation
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A measure of the direction and degree of linear relationship between two variables
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Significance of a correlation
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A demonstration that a sample correlation so large that it is very unlikely to have come from a population where the correlation is zero.
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Coefficient of determination
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The degree to the variability in one variable can be predicted by its relationship with another variable: measured by r squared
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Spearman correlation
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A correlation calculated for ordinal data. Also used to measure the consistency of direction for a relationship
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Monotonic relation
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A relationship that is consistently one-directional
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Point-bacterial correlation
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A correlation between two variables where one of the variables is dichotomous
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Phi-coefficient
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A correlation between two variables both of which are dichotomous
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