condition mean min max ZT0-3 133.155134 133.155134 133.155134 ZT4-7 133.560064 133.560064 133.560064 ZT8-11 146.912544 146.912544 146.912544 ZT12-15 129.3967975 129.3967975 129.3967975 ZT16-19 166.3578255 166.3578255 166.3578255 ZT20-23 191.9078585 191.9078585 191.9078585