condition mean min max ZT0-3 0.01379235 0.01379235 0.01379235 ZT4-7 0.03134205 0.03134205 0.03134205 ZT8-11 0.0597771 0.0597771 0.0597771 ZT12-15 0.0372162 0.0372162 0.0372162 ZT16-19 0.06775914999999999 0.06775914999999999 0.06775914999999999 ZT20-23 0.0130045 0.0130045 0.0130045