Determine whether the study depicts an observational study o…

Determine whether the study depicts аn оbservаtiоnаl study оr an  a) The personnel director at a large company would like to determine whether the company cafeteria is widely used by She calls each employee and asks them whether they usually bring their own lunch, eat at the company cafeteria, or go out for lunch.  [answer1]   b) A medical researcher obtains a sample of adults suffering from diabetes. She randomly assigns 30 people to a treatment group and 30 to a placebo group. The treatment group receives a medication over a period of three months and the placebo group receives a placebo over the same time frame. At the end of three months the patientsʹ symptoms are evaluated. [answer2]