I am having trouble following the book on how to find the effect size statistics for an independent sample t-test. here is my information from the data below.

Independent Samples Test
	Levene's Test for Equality of Variances	t-test for Equality of Means
F	Sig.	t	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference	95% Confidence Interval of the Difference
			Lower	Upper
Time spent eating Big Mac specials in seconds	Equal variances assumed	2.745	.106	-3.975	38	.000	-109.400	27.522	-165.116	-53.684
Equal variances not assumed			-5.397	30.828	.000	-109.400	20.272	-150.754	-68.046

Group Statistics
	Weight classification	N	Mean	Std. Deviation	Std. Error Mean
Time spent eating Big Mac specials in seconds	overweight	10	589.00	42.615	13.476
normal weight	30	698.40	82.949	15.144