condition mean min max ZT0-3 144.348725 104.73795000000001 183.9595 ZT4-7 47.1956 47.1956 47.1956 ZT8-11 48.000249999999994 48.000249999999994 48.000249999999994 ZT12-15 0 0 0 ZT16-19 116.40700000000001 116.40700000000001 116.40700000000001 ZT20-23 89.86875 89.86875 89.86875