The number of subjects needed in a study:
A) is determined by a mathematical formula.
B) should be enough to exclude differences between the control and experimental groups due to chance.
C) should be kept small so that the data are manageable and there is less room for statistical error.
D) a, b
D
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B 6 deficiency does NOT cause:
a. neurological symptoms. b. numbness in the extremities. c. anemia with large, deeply colored red blood cells. d. decreased antibody formation.
Allicin is found in which of the following foods?
A) Bananas B) Soy beans C) Garlic D) Limes E) Flaxseed
Supertasters tend _____
a. not to eat citrus fruits such as lemons, oranges, and limes b. to drink beverages such as tea and wine c. not to eat vegetables such as brussels sprouts, cabbage, and broccoli d. to describe themselves as "meat and potato eaters" e. to believe that dietary choices are important to health and well-being
Since the opening of the twentieth century, the average life expectancy in the U.S. has increased by
A) nearly 20 years. B) about 25 years. C) just over 10 years. D) more than 30 years.