Errors are normally distributed with mean 0 .
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of, pertaining to, or determined by regression analysis: regression curve; regression equation. dictionary.com
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Durbin-Watson is a statistic that is used in regression analysis. Its main goal is to notate autocorrelation presences in prediction errors.
The assumptions of Probit analysis are the assumption of normality and the assumption for linear regression.
In cases wherethe dependent variable can take any numerical value for a given set of independent variables multiple regression is used.But in cases when the dependent variable is qualitative(dichotomous,polytomous)then logistic regression is used.In Multiple regression the dependent variable is assumed to follow normal distribution but in case of logistic regression the dependent variablefollows bernoulli distribution(if dichotomous) which means it will be only0 or 1.