condition mean min max ZT0-3 3740.1000000000004 3740.1000000000004 3740.1000000000004 ZT4-7 3810.2 3810.2 3810.2 ZT8-11 3846.8 3846.8 3846.8 ZT12-15 3862.7 3862.7 3862.7 ZT16-19 4061.3999999999996 4061.3999999999996 4061.3999999999996 ZT20-23 3930.1499999999996 3930.1499999999996 3930.1499999999996