[Retracted] Analysis and Research on the Rehabilitation Effect of Physical Exercise on College Students’ Mental Depression Based on Multidimensional Data Mining

Table 1

Sampling distribution of undergraduate students from the university in Guangzhou.

Grade	Male	Female	Medical background	Nonmedical background	Rural areas	Urban areas	Total
Freshmen	3564	2420	152	5832	4263	1721	5984
Sophomores	3522	2301	146	5677	3823	2000	5823
Juniors	3437	2286	141	5550	4011	1950	5691
Seniors	3392	2254	139	5509	3963	1685	5648
Total	13915	9231	578	22568	16060	7086	23146