An epidemiologist is doing a study on the sleep patterns of…

An epidemiologist is doing a study on the sleep patterns of college students calculating the number of hours of sleep and asking the participants to fill out a tool with a Likert-type scale but does not provide any intervention.  What type of study is this? 

A complete epidemiologic description of the health of the co…

A complete epidemiologic description of the health of the community would include indices of health as well as indicators of the psychosocial milieu of the community.  Homicide and suicide rates, infant mortality, teenage pregnancy, and occurrence of sexually transmitted diseases are among the descriptive variables for the health of the community classified as which of the following variables?