Mathematics, 19.02.2020 04:51 KariSupreme

A large representative random sample of 6906 U. S. adults collected over 20 years showed that "parents reported higher levels of life satisfaction than nonparents," with the observed difference in life satisfaction between the two groups being statistically significant. This is an example of:
A) a matched pairs experiment
B) an observational study
C) a randomized comparative experiment

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A large representative random sample of 6906 U. S. adults collected over 20 years showed that "paren...