condition mean min max ZT0-3 192.149059 192.149059 192.149059 ZT4-7 315.4880905 315.4880905 315.4880905 ZT8-11 357.9260575 357.9260575 357.9260575 ZT12-15 308.991031 308.991031 308.991031 ZT16-19 280.4668105 280.4668105 280.4668105 ZT20-23 213.982596 213.982596 213.982596