Table 2.

Investigating the relationship between potassium level and exposure time based on various sound pressure levels

Potassium level (mg/L)	Exposure time (h)		Sum of squares	Degree of freedom	Mean square	F	P value
0.1	3	Between groups	13,048.66	2	6524.33	12.43	0.007
		Within groups	3149.33	6	524.88
	8	Between groups	2552.66	2	1276.33	4.31	0.06
		Within groups	1773.33	6	295.55
8	3	Between groups	4120.88	2	2060.44	16.21	0.004
		Within groups	762.66	6	127.11
	8	Between groups	21,510.22	2	10,755.11	43.40	<0.001
		Within groups	1486.66	6	247.77