condition mean min max ZT0-3 48.483575 45.01325 51.9539 ZT4-7 38.067750000000004 38.067750000000004 38.067750000000004 ZT8-11 53.12975 53.12975 53.12975 ZT12-15 0 0 0 ZT16-19 75.91495 75.91495 75.91495 ZT20-23 60.98035 60.98035 60.98035