Which of the following best describes sphericity?

a. The condition in which the data fit the regression line
b. The condition in which the variances of the differences between all possible pairs of groups (i.e., levels of the independent variable) are not equal
c. The condition in which the variances of the differences between all possible pairs of groups (i.e., levels of the independent variable) are equal
d. The condition in which a particular value accurately approximates the construct of interest


Ans: C

Psychology

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