condition mean min max ZT0-3 69.0952 69.0952 69.0952 ZT4-7 56.24135 56.24135 56.24135 ZT8-11 55.130700000000004 55.130700000000004 55.130700000000004 ZT12-15 61.103350000000006 61.103350000000006 61.103350000000006 ZT16-19 78.366 78.366 78.366 ZT20-23 71.03285 71.03285 71.03285