condition mean min max ZT0-3 140.882811 140.882811 140.882811 ZT4-7 133.55753900000002 133.55753900000002 133.55753900000002 ZT8-11 174.214826 174.214826 174.214826 ZT12-15 226.33227449999998 226.33227449999998 226.33227449999998 ZT16-19 214.06777 214.06777 214.06777 ZT20-23 210.69359550000001 210.69359550000001 210.69359550000001