Imagine we wanted to compare a group of married couples with a group of non-married couples on levels of relationship satisfaction. After collecting our data, we find that the mean age of our married group (M = 30) was significantly different from the mean age of our non-married group (M = 23) . What should we do?
A) Rerun the experiment, making sure to randomize participants to experimental groups.
B) Add 'age' into the analysis as a covariate to obtain a purer effect of marital status.
C) Conclude that the assumption of independence of the covariate and treatment effect has been met.
D) Run a bootstrapped ANCOVA with 'age' as the covariate.
Correct Answer:
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