condition mean min max ZT0-3 102.892025 95.57655 110.20750000000001 ZT4-7 34.50365 34.50365 34.50365 ZT8-11 16.43005 16.43005 16.43005 ZT12-15 0 0 0 ZT16-19 17.8676 17.8676 17.8676 ZT20-23 40.56335 40.56335 40.56335