Loss of fat below the skin in the cheeks, temples, chin, nose, and eye area may result in loosening skin, sunken eyes, and a skeletal appearance. Bone loss, mostly around the mouth and chin, may become evident after age 60 and cause puckering of the skin around the mouth.
Logistic regression allows one to predict a discrete outcome, such as group membership, from a set of variables that may be continuous, discrete, dichotomous, or a mix of any of these. Generally, the dependent or response variable is dichotomous, such as presence/absence or success/failure.
Answer Wiki. Regression is the process of fitting an (approximated) continuous function to a set of independent data points. This is useful for approximating dependent values (y) for independent values (x) that aren't present in the data set. You can even use this regression curve to predict values of y for x's that are outside of the range of the current dataset (extrapolation).