condition mean min max ZT0-3 10.819244 10.819244 10.819244 ZT4-7 10.045425 10.045425 10.045425 ZT8-11 21.6277815 21.6277815 21.6277815 ZT12-15 17.755942 17.755942 17.755942 ZT16-19 38.2769405 38.2769405 38.2769405 ZT20-23 44.1829715 44.1829715 44.1829715