condition mean min max ZT0-3 97.308993 97.308993 97.308993 ZT4-7 94.700493 94.700493 94.700493 ZT8-11 109.69364099999999 109.69364099999999 109.69364099999999 ZT12-15 112.571511 112.571511 112.571511 ZT16-19 87.25109950000001 87.25109950000001 87.25109950000001 ZT20-23 74.5313245 74.5313245 74.5313245