condition mean min max ZT0-3 58.87901 58.87901 58.87901 ZT4-7 83.506299 83.506299 83.506299 ZT8-11 105.416561 105.416561 105.416561 ZT12-15 71.44047549999999 71.44047549999999 71.44047549999999 ZT16-19 78.0587965 78.0587965 78.0587965 ZT20-23 71.98165499999999 71.98165499999999 71.98165499999999