Table 1.

Descriptive statistics among variables.

Variables	Mean	SD	Median	Min	Max	Skewness	Kurtosis
Grade	8.95	1.43	9	7	11	0.05	−1.33
Gender	1.51	0.5	2	1	2	−0.04	−2.00
Only child	1.71	0.45	2	1	2	−0.94	−1.12
Physical activity	43.82	22.65	45	1	100	0.4	−0.24
Interpersonal relationships	18.77	6.13	19	0	28	−0.59	0.13
Academic support	81.66	16.58	81	27	135	0.28	3.05
Academic engagement	86.01	22.71	87	17	119	−0.71	0.54