condition mean min max ZT0-3 725.3 725.3 725.3 ZT4-7 572.8 572.8 572.8 ZT8-11 468.9 468.9 468.9 ZT12-15 441.79999999999995 441.79999999999995 441.79999999999995 ZT16-19 651.5 651.5 651.5 ZT20-23 785.9000000000001 785.9000000000001 785.9000000000001