Table 4. Approximate F for the pre- and post-phases of stress and self-esteem.

Variables	Sum of squares	Df	Mean square	F
Stress	475.62	2	237.81	18.15 **
	2908.21	222	13.10
	3383.84	224
Self-esteem	981.47	2	490.73	23.21 **
	4693.41	222	21.14
	5674.88	224

** Significance at 0.01 level

Df: Degree of Freedom