For which of the following situations is it appropriate to use ANCOVA?
A) In each group, half of the participants had a time limit to write the words down. Whether a time limit was imposed was also included in the model.
B) The participants' socioeconomic status (low, middle, or high) was expected to have an effect on their performance and was also included in the model.
C) Participants took a vocabulary test before the experiment and the scores of the test were included in the model.
D) Participants took a vocabulary test after the experiment and the scores of the test were included in the model.

Question

Quizplus · Accepted Answer

The covariate should be measured on interval or ratio scale. Also, it is better that covariates are measured prior to the administration of the treatment so that the dependence of the covariate on the treatment can be minimized.)

For Which of the Following Situations Is It Appropriate to Use