Table 4.

Correlations between the most important statistical variables.

		Costs situation	Purchase price	Stock value	Personnel costs	Inventory savings	Gained self- /behind-the-counter service	Impact on OTC sales
Costs situation	Pearson correlation	1.000	−0.256*	0.329**	0.406**	−0.280*	−0.001	−0.149
	significance (2-tailed)		0.040	0.008	0.001	0.039	0.993	0.241
	N	67	65	64	67	55	64	64
Purchase price	Pearson correlation		1.000	−0.087	−0.149	0.046	−0.014	−0.093
	significance (2-tailed)			0.490	0.266	0.740	0.908	0.462
	N		72	65	68	55	68	65
Stock value	Pearson correlation			1.000	0.284*	−0.179	−0.078	−0.023
	significance (2-tailed)				0.020	0.190	0.544	0.859
	N			67	67	55	63	64
Personnel costs	Pearson correlation				1.000	−0.094	−0.085	−0.414**
	significance (2-tailed)					0.486	0.499	0.000
	N				70	57	66	67
Inventory savings	Pearson correlation					1.000	0.054	0.018
	significance (2-tailed)						0.697	0.898
	N					57	54	54
Gained self-/behind-the-counter service	Pearson correlation						1.000	0.238
	significance (2-tailed)							0.060
	N						69	63
Impact on OTC sales	Pearson correlation							1.000
	significance (2-tailed)
	N							67

^*The correlation is significant at 0.05% (two-tailed).

^**The correlation is significant at 0.01% (two-tailed).