condition mean min max ZT0-3 271.8405 271.8405 271.8405 ZT4-7 285.73249999999996 285.73249999999996 285.73249999999996 ZT8-11 242.4795 242.4795 242.4795 ZT12-15 218.017 218.017 218.017 ZT16-19 170.489 170.489 170.489 ZT20-23 241.0885 241.0885 241.0885