condition mean min max ZT0-3 2996.168684 2996.168684 2996.168684 ZT4-7 5228.861836 5228.861836 5228.861836 ZT8-11 3445.0109460000003 3445.0109460000003 3445.0109460000003 ZT12-15 2593.281367 2593.281367 2593.281367 ZT16-19 1125.478249 1125.478249 1125.478249 ZT20-23 567.4549280000001 567.4549280000001 567.4549280000001