condition mean min max ZT0-3 19.0547 16.9617 21.7997 ZT4-7 31.982549999999996 31.982549999999996 31.982549999999996 ZT8-11 35.45215 35.45215 35.45215 ZT12-15 40.705875 39.86435 41.547399999999996 ZT16-19 36.81045 36.81045 36.81045 ZT20-23 27.139899999999997 27.139899999999997 27.139899999999997