TABLE 3.

Descriptive statistics by treatment groups^a

	E-to-E (control)			S-to-E (treatment week 1)			E-to-S (treatment week 2)
Variable	N	Mean	SD	N	Mean	SD	N	Mean	SD
Pretest	284	0.686	0.256	111	0.705	0.337	118	0.702	0.340
Quiz 1	270	0.700	0.206	109	0.651	0.208	118	0.644	0.222
Quiz 2	270	0.711	0.276	107	0.729	0.247	115	0.724	0.252
Posttest	284	0.886	0.227	111	1.066	0.268	118	1.113	0.261

^aDescriptive statistics are based on the original data set (un-imputed). The E-to-E group consisted of 13 sections. S-to-E and E-to-S groups consisted of five sections each.