condition mean min max ZT0-3 2.86193401425 2.7083537724999998 3.0155142560000003 ZT4-7 2.86190712225 2.413621594 3.3101926504999994 ZT8-11 3.7012925775 3.649186424 3.753398731 ZT12-15 2.8203783207499997 2.7664859584999997 2.8742706829999998 ZT16-19 3.7138620639999997 2.7018509920000002 4.725873136 ZT20-23 11.376929216499999 7.808023928 14.945834504999999