condition mean min max ZT0-3 209.38183333333333 207.102 211.262 ZT4-7 169.322 169.322 169.322 ZT8-11 175.2995 175.2995 175.2995 ZT12-15 263.228 243.833 282.623 ZT16-19 285.7795 285.7795 285.7795 ZT20-23 236.41700000000003 236.41700000000003 236.41700000000003