Surveys using a(n) _________ design take a sample of the population at a single point in time and expect to find variability of the independent variable. A _________ design follows the same sample over a period of time.
a. cross-sectional; longitudinal
b. panel; cross-sectional
c. incidence; trend
d. fixed-point; chronological
Question 2
Losing weight as a move to improve one's health would be regarded as what type of intervention?
a. structural
b. behavioral
c. medical
d. environmental
e. none of the above
When teenagers live in single-parent homes, a good relationship with grandparents is related to ...
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