# Italiano Dictionaries | Translate From Italiano

## Few words

regression equationthe equation representing the relation between selected values of one variable (x) and observed values of the other (y); it permits the prediction of the most probable values of y
regression of y on xthe equation representing the relation between selected values of one variable (x) and observed values of the other (y); it permits the prediction of the most probable values of y
regression coefficientwhen the regression line is linear (y = ax + b) the regression coefficient is the constant (a) that represents the rate of change of one variable (y) as a function of changes in the other (x); it is the slope of the regression line
linear regressionthe relation between variables when the regression equation is linear: e.g., y = ax + b
rectilinear regressionthe relation between variables when the regression equation is linear: e.g., y = ax + b
curvilinear regressionthe relation between variables when the regression equation is nonlinear (quadratic or higher order)
regression linea smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line
regression curvea smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line
time seriesa series of values of a variable at successive times
vital statisticsdata relating to births and deaths and health and diseases and marriages
correlational analysisthe use of statistical correlation to evaluate the strength of the relations between variables
correlation matrixa matrix giving the correlations between all pairs of data sets
factor analysisany of several methods for reducing correlational data to a smaller number of dimensions or factors; beginning with a correlation matrix a small number of components or factors are extracted that are regarded as the basic variable that account for the int
analysis of variancea statistical method for making simultaneous comparisons between two or more means; a statistical method that yields values that can be tested to determine whether a significant relation exists between variables
ANOVAa statistical method for making simultaneous comparisons between two or more means; a statistical method that yields values that can be tested to determine whether a significant relation exists between variables
correlation tablea two-way tabulation of the relations between correlates; row headings are the scores on one variable and column headings are the scores on the second variables and a cell shows how many times the score on that row was associated with the score in that co
correlationa statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
correlational statisticsa statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
curvilinear correlationany correlation in which the rates of change of the variables is not constant
nonlinear correlationany correlation in which the rates of change of the variables is not constant
skew correlationany correlation in which the rates of change of the variables is not constant
partial correlationa correlation between two variables when the effects of one or more related variables are removed
first-order correlationa partial correlation in which the effects of only one variable are removed (held constant)
correlation coefficienta statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation); "what is the correlation between those two variables?"
coefficient of correlationa statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation); "what is the correlation between those two variables?"