condition mean min max ZT0-3 89.15 89.15 89.15 ZT4-7 187.3 187.3 187.3 ZT8-11 192.3 192.3 192.3 ZT12-15 359.7 359.7 359.7 ZT16-19 314.79999999999995 314.79999999999995 314.79999999999995 ZT20-23 147.7 147.7 147.7