condition mean min max ZT0-3 621.3 621.3 621.3 ZT4-7 219.7 219.7 219.7 ZT8-11 284.65 284.65 284.65 ZT12-15 419.9 419.9 419.9 ZT16-19 627.8499999999999 627.8499999999999 627.8499999999999 ZT20-23 610.3499999999999 610.3499999999999 610.3499999999999