condition mean min max ZT0-3 0.6385952500000001 0.5166204999999999 0.7605700000000001 ZT4-7 0.843996 0.843996 0.843996 ZT8-11 0.5818725 0.5818725 0.5818725 ZT12-15 0 0 0 ZT16-19 0.825021 0.825021 0.825021 ZT20-23 1.08453 1.08453 1.08453