Q356
Nine year olds are taller than seven year olds. This is an example of a reference drawn from
A.
Vertical study
B.
Cross-sectional study
AnswerC.
Time series study
D.
Experimental study
Answer: Option B
Solution
Answer: Option B
Solution:
Nine year olds are taller than seven year olds. This is an example of a reference drawn from cross-section study.