condition mean min max ZT0-3 1.10555 1.10555 1.10555 ZT4-7 4.68473 4.68473 4.68473 ZT8-11 3.054085 3.054085 3.054085 ZT12-15 1.46172 1.46172 1.46172 ZT16-19 0.6832575 0.6832575 0.6832575 ZT20-23 0.5186014999999999 0.5186014999999999 0.5186014999999999