condition mean min max ZT0-3 1563.6999999999998 1563.6999999999998 1563.6999999999998 ZT4-7 853.9 853.9 853.9 ZT8-11 773.0 773.0 773.0 ZT12-15 830.15 830.15 830.15 ZT16-19 1084.8 1084.8 1084.8 ZT20-23 1455.0 1455.0 1455.0