If a health psychologist wants to know if regular exercise improves people's health, the type of hypothesis the psychologist would use is
A) one-tailed because the study is only interested in whether the exercise increases health.
B) one-tailed because the study only looks at the effects of exercise and does not consider other factors.
C) two-tailed because the study will have to involve both healthy and unhealthy people.
D) two-tailed because no direction for any observed difference has been predicted.
A
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fill in the blank with correct word
What percentage of elderly people finish their lives in nursing homes?
a) 3 percent b) 5 percent c) 7 percent d) 10 percent