If, in a randomized ANOVA there are three groups with 10 subjects in each group, then the df for the F-ratio is equal to:

Darrell is 13 years old and is always late. He can never figure out how long it's likely to take to do a task or to reach his goals. Erikson would say that Darrell still hasn't solved the conflict between:

A) self-certainty versus self-consciousness. B) temporal perspective vs. time confusion. C) role experimentation vs. role fixation. D) ideological commitment vs. confusion of values.

If these data were to be placed on a scatter plot, the general slope of the array of data points would be

a. straight across b. upper left to lower right c. lower left to upper right d. U shaped