Developing Students’ Mathematical Critical Thinking Skills Using Open-Ended Questions and Activities Based on Student Learning Preferences

Table 9

Dependent t-test on critical thinking skills of students at all performance levels.

Period	N	Maximum score	Difference between pre- and post-test scores	Standard deviation	t
Pretest-posttest of students at low performance	17	18	4.734	3.940	4.955	0.000
Pretest-posttest of students at fair performance	7	18	6.286	3.946	4.214	0.006
Pretest-posttest of students at high performance	4	18	6.000	2.828	4.243	0.024

.