condition mean min max ZT0-3 16.823 15.604800000000001 18.0412 ZT4-7 6.74071 6.74071 6.74071 ZT8-11 9.350954999999999 9.350954999999999 9.350954999999999 ZT12-15 0 0 0 ZT16-19 17.94785 17.94785 17.94785 ZT20-23 18.4333 18.4333 18.4333