condition mean min max ZT0-3 1.1553897499999999 0.9316344999999999 1.379145 ZT4-7 0.708247 0.708247 0.708247 ZT8-11 0.2829199 0.2829199 0.2829199 ZT12-15 0 0 0 ZT16-19 0.916877 0.916877 0.916877 ZT20-23 1.2422149999999998 1.2422149999999998 1.2422149999999998