thank you ! Does the assumption for poisson regression mean that the mean of all the Y values of the observed data points must be equal to the variance of all the Y values of the observed data points in the scatter plot? Or does it mean that the mean of all the oberved the Y values pertaining to a certain x value (each x value) must be equal to the variance of the y values pertaining to a particular x value? thanks !
thank you ! Does the assumption for poisson regression mean that the mean of all the Y values of the observed data points must be equal to the variance of all the Y values of the observed data points in the scatter plot?
Or does it mean that the mean of all the oberved the Y values pertaining to a certain x value (each x value) must be equal to the variance of the y values pertaining to a particular x value? thanks !
What ... about Gama-reg instead OD-Poisson, if all y>0???