To see if breast-feeding influences the incidence of the disease rickets, researchers study rates of breast-feeding of infants with and without rickets. This is an example of
A. experimental research.
B. observational research.
C. epidemiological research.
D. double-blind placebo-controlled research.
ANS: B
You might also like to view...
What is the benefit of using controls in an experiment?
a. The size of the groups can be very large b. The subjects do not know anything about the experiment c. The subjects who are treated are balanced against the placebos d. The subjects are similar in all respects except for the treatment being tested
The least calcium is absorbed into the body from which food?
A) Yogurt B) Milk C) Dried beans D) Spinach
Which of the following supplements is proposed to slow the progression of osteoarthritis and its pain?
A) Glucosamine-chondroitin B) Ginseng C) St. John's wort D) Echinacea E) Ginkgo biloba
The 2015 Food and Health Survey indicated that after taste, ________ is now the number two reason why people choose the food they do.
A. nutrition B. cost C. convenience