condition mean min max ZT0-3 171.88326 171.88326 171.88326 ZT4-7 111.06733349999999 111.06733349999999 111.06733349999999 ZT8-11 116.57072249999999 116.57072249999999 116.57072249999999 ZT12-15 291.21488999999997 291.21488999999997 291.21488999999997 ZT16-19 206.06196 206.06196 206.06196 ZT20-23 415.106883 415.106883 415.106883