Fostering Achievement of Low-, Average-, and High-Achievers Students in Biology through Structured Cooperative Learning (STAD Method)

Table 10

Estimated marginal means.

Group	Mean	Std. error	95% confidence interval
			Lower bound	Upper bound
Experimental	76.593^a	1.200	73.919	79.266
Control	67.308^a	1.299	64.414	70.203

^aCovariates appearing in the model are evaluated at the following values: pretotal score test = 25.62.