condition mean min max ZT0-3 86.3509 86.3509 86.3509 ZT4-7 75.72665 75.72665 75.72665 ZT8-11 49.3293 49.3293 49.3293 ZT12-15 36.51415 36.51415 36.51415 ZT16-19 46.9409 46.9409 46.9409 ZT20-23 76.3073 76.3073 76.3073