condition mean min max ZT0-3 0.9703565000000001 0.8526015 1.0881115000000001 ZT4-7 0.9419489999999999 0.9419489999999999 0.9419489999999999 ZT8-11 1.41345 1.41345 1.41345 ZT12-15 0 0 0 ZT16-19 1.172876 1.172876 1.172876 ZT20-23 1.1359295 1.1359295 1.1359295