If an independent t ratio is to be calculated for a two-group design, 20
subjects in each group, then the degrees of freedom equal
a. 1
b. .05
c. 40
d. 38
d
Psychology
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In general, which of the following best describes the overall pattern for substance use from ages 18 through 45? Substance use
a. steadily increases. b. peaks in the early 20s. c. steadily decreases. d. declines in the late 30s.
Psychology
Information selected from sensory memory is transferred to conscious awareness or
a. primary memory. b. short-term memory. c. factual memory. d. long-term memory.
Psychology