표 1. | Table 1. Pitch span과 Pitch level의 독립표본 t-검정 | Results of t-test on Pitch span and Pitch level

		N	Mean(SD)	t-value	p-value
Pitch span	KS	168	21.38 (4.51)	−7.605	.000
	CS	720	24.40 (5.16)
Pitch level	KS	168	12.10 (2.83)	−7.192	.000
	CS	720	13.98 (3.82)