condition mean min max ZT0-3 53.786075000000004 43.35705 64.2151 ZT4-7 18.69705 18.69705 18.69705 ZT8-11 18.96225 18.96225 18.96225 ZT12-15 0 0 0 ZT16-19 26.8935 26.8935 26.8935 ZT20-23 33.6114 33.6114 33.6114