Statistical Methods for Psychology

=3910.742

SSerror=SStotal 2 SStreat=4525.386 2 614.644

=614.644

= 26 (-0.45 2 2.76)^2129 (3.01 2 2.76)^21 (17 * (7.26 2 2.76)^2 )

SStreat= anj(Xj 2 X..)^2

=4525.386

SStotal= a(Xij 2 X..)^2 = 3 ( -0.5 2 2.76)^21 (-9.3 2 2.76)^21... 1 (10.7 2 2.76)^24

Section 11.7 Unequal Sample Sizes 333

Table 11.5 Data from Everitt on the treatment of anorexia
in young girls

Cognitive-

Behavior Family

Control Therapy Therapy Total

−.5 1.7 11.4

−9.3 .7 11.0

−5.4 −.1 5.5

12.3 −.7 9.4

−2.0 −3.5 13.6

−10.2 14.9 −2.9

−12.2 3.5 −.1

11.6 17.1 7.4

−7.1 −7.6 21.5

6.2 1.6 −5.3

−.2 11.7 −3.8

−9.2 6.1 13.4

8.3 1.1 13.1

3.3 −4.0 9.0

11.3 20.9 3.9

.0 −9.1 5.7

−1.0 2.1 10.7

−10.6 −1.4

−4.6 1.4

−6.7 −.3

2.8 −3.7

.3 −.8

1.8 2.4

3.7 12.6

15.9 1.9

−10.2 3.9

.1

15.4

−.7

Mean −0.45 3.01 7.26 2.76
St. Dev. 7.989 7.308 7.157 7.984
Variance 63.819 53.414 51.229 63.738
n 26 29 17 72