condition mean min max ZT0-3 34.252672 34.252672 34.252672 ZT4-7 36.689605 36.689605 36.689605 ZT8-11 33.454612499999996 33.454612499999996 33.454612499999996 ZT12-15 32.535421 32.535421 32.535421 ZT16-19 38.0178455 38.0178455 38.0178455 ZT20-23 43.371781999999996 43.371781999999996 43.371781999999996