condition mean min max ZT0-3 219.00384 219.00384 219.00384 ZT4-7 219.1171445 219.1171445 219.1171445 ZT8-11 243.466411 243.466411 243.466411 ZT12-15 395.643462 395.643462 395.643462 ZT16-19 268.96271249999995 268.96271249999995 268.96271249999995 ZT20-23 337.81493 337.81493 337.81493