An analysis of covariance (ANCOVA) is conducted for a study using the pretest and posttest scores of two groups. The F-ratio is statistically significant. What does this mean?
a. There is a significant difference between the two groups on the posttest scores when the effects of the pretest scores are controlled.
b. There is a significant difference between the two groups on the pretest scores when the effects of the posttest scores are controlled.
c. There are significant differences between the two groups on both the pretest and the posttest scores.
d. All of these.
A
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