Participants were randomly allocated to one of two stress management therapy groups, or a waiting list control group.
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1. Participants were randomly allocated to one of two stress management therapy groups, or a waiting list control

group. Their baseline levels of stress were measured before treatment, and again after 3 months of weekly therapy sessions. The researcher decided to run an ANCOVA on her data. What was the covariate?


a.      This is not an appropriate design for ANCOVA.

b.     Time

c.      Baseline stress levels 

d.     Treatment group

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