6. A nutritionist believes that having each player take a vitamin pill before a game enhances the performance of the football team. During the course of one season, each player takes a vitamin pill before each game, and the team achieves a winning season for the first time in several years. Is this an experiment or an observational study? A) An experiment, but with no reasonable conclusion possible about cause and effect. B) An experiment, thus making cause and effect a reasonable conclusion. C) An observational study, because there was no use of a control group. D) An observational study, but a poorly designed one because randomization was not used. E) An observational study, thus allowing a reasonable conclusion of association but not of cause and effect. 7. Researchers were interested to know whether internal vehicle temperatures vary by outside temperatures. To evaluate this, temperature rise was measured continuously over a 60-minute period in a dark sedan on 16 different clear, sunny days with outside temperatures ranging from 72F to 96F. the researchers' method of analysis is best described as (Pearson's test prep, pg 67, #3) A) a census B) a survey C) an observational study D) a randomized comparative experiment Ela single blind randomized comparative experiment