condition mean min max ZT0-3 71.8893 43.4739 94.1917 ZT4-7 34.092349999999996 34.092349999999996 34.092349999999996 ZT8-11 31.5321 31.5321 31.5321 ZT12-15 50.593775 47.719 53.46855 ZT16-19 66.30494999999999 66.30494999999999 66.30494999999999 ZT20-23 93.05115 93.05115 93.05115