condition mean min max ZT0-3 0.062733825 0.04252665 0.082941 ZT4-7 0.0432543 0.0432543 0.0432543 ZT8-11 0.0852111 0.0852111 0.0852111 ZT12-15 0 0 0 ZT16-19 0.08354914999999999 0.08354914999999999 0.08354914999999999 ZT20-23 0.0836175 0.0836175 0.0836175