Schools | Mean Diff | Std. Deviation | Std. Error Mean | 95% Confidence Interval of the Difference | t | df | Sig. (2-tailed) | |||
Lower | Upper | |||||||||
Experimental group | School A | 1.067 | 1.321 | .341 | .335 | 1.798 | 3.127 | 14 | .007* | |
School B | 1.000 | .756 | .195 | .581 | 1.419 | 5.123 | 14 | .000* | ||
Controlled group | School A | .000 | .707 | .204 | −.449 | .449 | .000 | 11 | 1.000 | |