Suppose that a group of researchers at Podunk University found and tracked two groups of subjects for a period of 6 months. The first group of subjects consisted of people that voluntarily chose to include WHOLE GRAIN in their diets, while the second group of subjects consisted of people that chose not to include WHOLE GRAIN in their diets. At the end of the 6 month period, the researchers found that the mean weight loss for the "WHOLE GRAIN" group was significantly higher than the mean weight loss for the group that did not eat WHOLE GRAIN. CHECK ALL THAT Apply
a. Observational Study
b. Experiment.
c. The subjects CHOSE whether they ate WHOLE GRAIN (or not).
d. The subjects were RANDOMLY ASSIGNED to eat WHOLE GRAIN (or not).
e. The researchers CANNOT say that eating whole grain CAUSES additional weight loss.
f. The researchers CAN say that eating whole grain CAUSES additional weight loss.
g. Not only can the researchers can say that eating whole grain CAUSES additional weight loss, but they can generalize their results to the .entire population.