condition mean min max ZT0-3 20.6693 20.6693 20.6693 ZT4-7 20.41075 20.41075 20.41075 ZT8-11 36.0411 36.0411 36.0411 ZT12-15 27.51515 27.51515 27.51515 ZT16-19 38.78945 38.78945 38.78945 ZT20-23 24.43325 24.43325 24.43325