condition mean min max ZT0-3 0.952008 0.952008 0.952008 ZT4-7 0.9575975000000001 0.9575975000000001 0.9575975000000001 ZT8-11 0.8916445 0.8916445 0.8916445 ZT12-15 1.0218099999999999 1.0218099999999999 1.0218099999999999 ZT16-19 1.126105 1.126105 1.126105 ZT20-23 1.092325 1.092325 1.092325