condition mean min max ZT0-3 49.119550000000004 36.8275 55.99025 ZT4-7 20.96385 20.96385 20.96385 ZT8-11 26.3981 26.3981 26.3981 ZT12-15 56.77305 53.80435 59.74175 ZT16-19 67.1351 67.1351 67.1351 ZT20-23 87.24475000000001 87.24475000000001 87.24475000000001