condition mean min max ZT0-3 45.0168 45.0168 45.0168 ZT4-7 38.263099999999994 38.263099999999994 38.263099999999994 ZT8-11 28.319699999999997 28.319699999999997 28.319699999999997 ZT12-15 24.70915 24.70915 24.70915 ZT16-19 27.694650000000003 27.694650000000003 27.694650000000003 ZT20-23 36.8254 36.8254 36.8254