condition mean min max ZT0-3 78.570211 78.570211 78.570211 ZT4-7 81.84942649999999 81.84942649999999 81.84942649999999 ZT8-11 94.88882050000001 94.88882050000001 94.88882050000001 ZT12-15 107.150608 107.150608 107.150608 ZT16-19 88.91810799999999 88.91810799999999 88.91810799999999 ZT20-23 92.412541 92.412541 92.412541