condition mean min max ZT0-3 63.488402 63.488402 63.488402 ZT4-7 83.328978 83.328978 83.328978 ZT8-11 85.7755885 85.7755885 85.7755885 ZT12-15 80.14319950000001 80.14319950000001 80.14319950000001 ZT16-19 106.6618215 106.6618215 106.6618215 ZT20-23 106.347579 106.347579 106.347579