Puberty takes place between ages ________ for most youth.
A. 10 and 17
B. 9 and 16
C. 11 and 18
D. 8 and 15
Answer: B
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Which of the following measures of central tendency is potentially misleading if the data are collected on an ordinal scale?
a. mean b. median c. mode d. none of the above
When correlation coefficients are calculated for a number of variables at once, they can all be reported in a correlation _____
a. tower c. graph b. table d. matrix
Bruno's father suffers from major depression. Compared with his cousin, who has no history of mental illness in her family, how much more likely is Bruno to develop major depression?
A) Six times more likely B) Four times more likely C) Two to three times more likely D) Seven to eight times more likely
Most studies of sleep patterns show
a. a consistent ratio of three to one between time awake and time asleep. b. that it is unhealthy for anyone to sleep less than six hours a day. c. that midafternoon sleepiness is a natural part of the wake-sleep cycle. d. that these sleep patterns are innate and unchangeable.