If the power for a hypothesis test is calculated to be 0.80, then for same test, the probability of a Type II error is 0.20

Bob is a participant in a study investigating the effectiveness of Ritalin in treating ADHD. Bob has ADHD, but is in a group that received a placebo (sugar pills) instead of Ritalin. Bob is in the _____ group

a) experimental b) random c) control d) observational

How many physiological and psychological functions are affected by the circadian rhythms?

a) two; sleep and wakefulness b) three; sleep, wakefulness, and temperature c) virtually every one that has been studied d) four; sleep, wakefulness, temperature, and digestion