A sample of attending high school students are surveyed to measure teenage use of illegal drugs, however, the sample is biased because it does not include home schooled students or dropouts to represent all teenagers. What type of bias is illustrated in this example?
A. publication bias
B. sampling bias
C. nonresponse bias
D. citation bias
Answer: B
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The American Academy of Pediatrics recommends that babies sleep on their backs rather than on their sides or stomachs. What outcome is this recommendation intended to avoid?
A. waking during the night B. sudden infant death syndrome (SIDS) C. interrupted autostimulation D. disrupted REM sleep
Which of the following is an example of point prevalence?
A. Fifty people had panic attacks in the last year. B. Eighty people in one graduating class were diagnosed with bulimia at some time during the past four years. C. Fifteen percent of the population is currently experiencing symptoms of anxiety. D. Twelve percent of women will suffer from depressive disorder before the age of 30.
Calculate the mean for the following set of scores: 4, 8, 3, 7
a. 3.0 b. 4.5 c. 5.5 d. 6.0
The concordance rate for bipolar disorder among identical twins has been found to be as high as _________ percent
a. 10-20 b. 25-40 c. 40-70 d. 70-85