Table 3.
Group Differences of Radon Exhalations from Hwangtohs along with Production Regions

Production region	Overall Avg.in chamber. (pCi/L)	Total mean± SD	MinMax	F-test	P-Value	Group difference
A Province	6.3 (A)	6.2539±2.3031	.0011.00	198.514	.000	C,A<B<D
B Province	7.2 (B)	7.2057±2.5644	.4012.10
C Province	5.7 (C)	5.7409±2.1216	.6011.00
D Province	11.7 (D)	11.672±4.1794	.4019.00
Total	7.7	7.7180±3.7319	.0019.00