Medical experts recommend that adults between the ages of 50 to 59 receive a colonoscopy at age __________ as a baseline and then every __________ thereafter.

Once a court rules on a case, that case becomes ________, and future decisions are based upon it

a. ideology b. new law c. code d. precedent

Confounding of variables is more the rule than the exception in which type of research?

A) Differential research B) Experimental research C) Psychological research D) Mathematical research