[Retracted] Research on a Health Care Personnel Training Model Based on Multilayered Knowledge Mapping for the Integration of Nursing Courses and Examinations

Table 4

Four datasets sampled with different levels of sparsity.

Data set	Total interactions	Average number of interactions	Sparsity (%)
Sparse data set	163527	32	96.51
Sparse dataset	209494	41	95.53
Dense data set	286025	57	93.89
Dense data set	521750	104	88.86