Table 1.

Positive symptom scores in Positive and Negative Syndrome Scale (PANSS)

	Experimental group	Control group	Difference
Observations	14	11	3
	15	10	5
	16	12	4
	13	9	4
	12	10	2
	13	13	0
	15	14	1
	16	12	4
	14	10	4
	15	11	4
Sum	143	112	31
Mean	14.3	11.2	3.1

* The values of differences are used for the calculation of paired t-test in example 2