In the example in the text assessing the effect of family therapy on anorexic girls by the mean levels of weight gain, the difference between the independent samples design used there and the related means design used in Chapter 13 is that the independent samples design
a. compared the mean weight gained by anorexic girls in family therapy to the mean weight gained by girls in a control group.
b. compared the means of pre-therapy weights to the means of post-therapy weights.
c. assumed the weight gains of the two groups would be related.
d. assessed family therapy as a predictor of weight gain.
Question 2
In deciding whether or not to pool the variances in calculating a t score, one should consider
a. the differences in the sample variances.
b. the differences in the sample sizes.
c. both a and b
d. neither a nor b
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