condition mean min max ZT0-3 276.4585 252.013 300.904 ZT4-7 150.562 150.562 150.562 ZT8-11 109.34085 109.34085 109.34085 ZT12-15 0 0 0 ZT16-19 170.295 170.295 170.295 ZT20-23 186.1415 186.1415 186.1415