When an event must occur, its probability value is
a. .99
b. 1.00
c. 0
d. 100%
b
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Of the following causes, what do adults in their 20s and 30s have a higher risk of dying from?
A. alcoholism B. automobile accidents C. drug abuse D. suicide
Which research strategy is least concerned with examining relationships between variables?
a. descriptive b. correlational c. experimental d. quasi-experimental
Nicotine acts in the brain by
A. increasing serotonin reuptake. B. enhancing GABA's inhibitory effects. C. reducing blood flow to the cerebral cortex. D. first stimulating and then blocking cholinergic receptors.
Teresa, a star player in women's college softball, is participating in a home run contest. If the probability she will hit a home run on any pitch is 0.65 what is the probability that out of 10 tries, at least 7 will be home runs?
a. 0.5139 c. 0.0719 b. 0.0260 d. 0.6496