condition mean min max ZT0-3 14.781125 14.6977 14.864550000000001 ZT4-7 9.59767 9.59767 9.59767 ZT8-11 14.695699999999999 14.695699999999999 14.695699999999999 ZT12-15 0 0 0 ZT16-19 20.74455 20.74455 20.74455 ZT20-23 14.499550000000001 14.499550000000001 14.499550000000001