Table 1. Differences between the number of leading indicators applied by the groups of companies with occupational accident rates (per 1000 workers) over and under 10.

			Number of leading indicators applied
Occupational accident rates (per 1000 workers)	Number of companies	%	Statistics		SE
≤10	31	51.7	M	5.5	0.59
			Mdn	6.0
			SD	3.3
			Interquartile range	6.0
			Asymmetry	–0.3	0.42
			Kurtosis	–1.2	0.82
>10	29	48.3	M	3.5	0.53
			Mdn	3.0
			SD	2.9
			Interquartile range	4.0
			Asymmetry	0.6	0.43
			Kurtosis	–0.8	0.84