condition mean min max ZT0-3 356.0 356.0 356.0 ZT4-7 204.5 204.5 204.5 ZT8-11 285.20000000000005 285.20000000000005 285.20000000000005 ZT12-15 309.05 309.05 309.05 ZT16-19 256.45 256.45 256.45 ZT20-23 326.65 326.65 326.65