A measure of how much scores within a distribution differ among themselves is the
a. mean
b. frequency.
c. variance.
d. median.
c
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In promoting STEM educational reform, access to internships and mentorships are examples of __________.
A. opportunity structures B. stereotype threats C. intrinsic motivation D. hypothetico-deductive reasoning
Russ is a geneticist who studies the nitrogen bases in the DNA molecule. Which of these is he studying?
a. Phenylthiocarbamide b. Alleles c. Cytosine d. Proteome
A teratogen is
A. any substance that disrupts normal prenatal development. B. a vital nutrient that helps a fetus develop properly. C. a weak brain synapse that disappears at around age six. D. a brain region responsible for the ability to speak.
In which of the following countries is violent crime and physical punishment of children more frequent?
A. The United States of America B. Japan C. Tahiti D. The People's Republic of China