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.
multiple correlation multiple regression a statistical technique that predicts values of one variable on the basis of two or more other variables regression analysis the use of regression to make quantitative predictions of one variable from the values of another correlational analysis the use of statistical correlation to evaluate the strength of the relations between variables