The Effect of Low-Level Laser Therapy on Hearing

Table 5

Kruskal-Wallis test for difference between CST group medians, expressed in rationalized arcsine units. This test was performed on scores transformed to ranks. The ranks assigned to tied scores were the average of the ranks those scores would have had if they were not tied. Adjusted scores (adj.) are also shown. The adjustment is based on the fact that the variance of the ranks is smaller when ties are present. Its use is justifiable in cases where ties can be assumed to be present in the population. Here, it is assumed that many of the ties are due to rounding. The adjustment is small unless there are large numbers of tied scores.

Source	SS	df	Kw	𝑃	Kw (adj.)	𝑃 (adj.)
Between	123.08	2	4.036	0.133	4.063	0.131