condition mean min max ZT0-3 0.8273157499999999 0.716598 0.9380335 ZT4-7 1.890822 1.890822 1.890822 ZT8-11 7.639695 7.639695 7.639695 ZT12-15 0 0 0 ZT16-19 5.63902 5.63902 5.63902 ZT20-23 3.5485 3.5485 3.5485