If a population of scores is normally distributed, has a mean of 45 and a standard deviation of 6, the most extreme 5% of the scores lie beyond the score(s) of _________
a. 35.13 c. 56.76 and 33.24
b. 45.99 d. 45.99 and 35.13
C
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Critics argue that _____ research model of rats pressing levers for food reward, while generating research high in _____ validity, is limited in its _____ validity.
A) Skinner's; internal; external B) Skinner's; external; internal C) Watson's internal; external D) Watson's external; internal
Many of the capsules, pills, and powders that look like drugs and that consumers think of as drugs are actually classified by the FDA as
A. food products. B. industrial chemicals. C. organic medicines. D. placebos.
Human art first appeared during the ____
a. Upper Paleolithic period b. Lower Mesozoic period c. Middle Cenozoic period d. Lower Jurassic period
Trisomy 21 is another name for
A) Huntington's disease. B) Tay-Sachs disease. C) Down syndrome. D) fragile X mental retardation.