When testing for the significance of the difference between two samples, which is the proper assumption for step 1?
a. Random sampling
b. Ordinal level of measurement
c. Degrees of freedom are zero
d. Samples are independent as well as random
ANSWER: d
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Thirty years of research has shown that ______ is/are predictive of future health outcomes.
A. self-ratings of health B. objective assessments of one's exercise habits C. the number of times one visits the doctor D. a spouse's rating of one's health
The reason polygamy occurs relatively infrequently is that:
a. it is against the law nearly everywhere. b. most cultures find it morally reprehensible. c. it is expensive and only a few can afford it. d. it weakens society by restricting the ties among members. e. there are not enough societies with a surplus of women.
What was the most dramatic change in the geography of the world during Iris Summers’ lifetime?
a. the loss of forested land and the dramatic increase in farmland b. the largest cities shifted from being those located on the coasts to inland cities where they were safer from attack c. immigration from poor countries to richer countries swelled after mid-century d. 125 nations were added to the map of the world, most by gaining independence after an era of European colonialism
Eighty-five percent of deaf people choose to marry others who share their language and culture, thereby practicing ______.
A. endogamy B. exogamy C. homogamy D. androgyny