Correlation+Definitions


 * Correlation -** a measure of relationship between two mathematical variables or measured data values
 * Bivariate Correlation -** statistical relationships between two or more random variables or observed data values
 * Positive Correlation -** a correlation in which large values of one variable are associated with large values of the other and small with small; the correlation coefficient is between 0 and +1
 * Negative Correlation -** a correlation in which large values of one variable are associated with small values of the other; the correlation coefficient is between 0 and -1
 * Scatter Plot -** A graphical representation of data involving two (or sometimes more) variables, in which each data point is plotted in a coordinate plane, with one variable labeled along the horizontal axis, the other along the vertical axis
 * Linear Relationship -** A relationship in which an increase (or decrease) in one variable is associated with a corresponding increase (or decrease) in another variable
 * Nonlinear Relationship** - (curvilinear) a functional relationship between an independent and dependent variable that is graphically represented by a curved line
 * Outlier -** an observation that is numerically distant from the rest of the data
 * Correlation Coeffiecient** - A decimal number between .00 and +/-1.00 that indicates the degree to which two quantitative variables are related.
 * Coefficient of Determination -** the square of the correlation coefficient. It indicates the proportion of variance common to two variables.
 * Q****uantitative Variable -** A variable whose values are numerical in nature.
 * Categorical Variable** - a variable for which each value falls into one of a set of groups (eg gender, political party, plant species, type of behavior), a nominal variable