Answer :

Final Answer:

3 groups were examined.

thus correct option is c) 3

Explanation:

This conclusion can be reached by examining the information provided in the question. The notation "f(2, 57) = 10.80, p < .01" is commonly associated with an analysis of variance (ANOVA) or a regression analysis. In this context, the numbers in parentheses typically represent degrees of freedom.

The first number, 2, often corresponds to the degrees of freedom associated with the treatment or predictor variable, which signifies the number of groups or categories being compared. The second number, 57, is the degrees of freedom associated with the error term, which relates to the variability within the groups.

In this case, a degrees of freedom of 2 for the treatment variable implies that there were 3 groups being examined (2 + 1). This is because when comparing multiple groups, one group is typically used as a reference or control, and the degrees of freedom account for the differences between the groups. Therefore, the correct answer is 3 groups were examined.

thus correct option is c) 3

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