condition mean min max ZT0-3 1051.522058 1051.522058 1051.522058 ZT4-7 647.364108 647.364108 647.364108 ZT8-11 864.634943 864.634943 864.634943 ZT12-15 916.9264705 916.9264705 916.9264705 ZT16-19 654.5939705 654.5939705 654.5939705 ZT20-23 329.05988 329.05988 329.05988