condition mean min max ZT0-3 3091.242096 3091.242096 3091.242096 ZT4-7 816.591086 816.591086 816.591086 ZT8-11 546.36185 546.36185 546.36185 ZT12-15 407.2726985 407.2726985 407.2726985 ZT16-19 622.9234225 622.9234225 622.9234225 ZT20-23 597.6452455 597.6452455 597.6452455