condition mean min max ZT0-3 690.193374 690.193374 690.193374 ZT4-7 1092.4314064999999 1092.4314064999999 1092.4314064999999 ZT8-11 1253.7801415 1253.7801415 1253.7801415 ZT12-15 1265.3167315 1265.3167315 1265.3167315 ZT16-19 1011.049343 1011.049343 1011.049343 ZT20-23 1037.692061 1037.692061 1037.692061