condition mean min max ZT0-3 184.590152 184.590152 184.590152 ZT4-7 155.231366 155.231366 155.231366 ZT8-11 169.848995 169.848995 169.848995 ZT12-15 119.89276900000002 119.89276900000002 119.89276900000002 ZT16-19 92.366739 92.366739 92.366739 ZT20-23 39.8622915 39.8622915 39.8622915