condition mean min max ZT0-3 10.640767499999999 9.93931 11.342225 ZT4-7 27.6352 27.6352 27.6352 ZT8-11 62.403850000000006 62.403850000000006 62.403850000000006 ZT12-15 0 0 0 ZT16-19 47.4738 47.4738 47.4738 ZT20-23 38.278 38.278 38.278