condition mean min max ZT0-3 0.40432283333333335 0.0 0.805037 ZT4-7 0.742885 0.742885 0.742885 ZT8-11 0.3898525 0.3898525 0.3898525 ZT12-15 0.822665 0.780235 0.865095 ZT16-19 2.22655 2.22655 2.22655 ZT20-23 0.411021 0.411021 0.411021