condition mean min max ZT0-3 796.8778333333333 612.2815 938.356 ZT4-7 572.2270000000001 572.2270000000001 572.2270000000001 ZT8-11 718.804 718.804 718.804 ZT12-15 891.4875 840.7284999999999 942.2465 ZT16-19 903.002 903.002 903.002 ZT20-23 1037.1970000000001 1037.1970000000001 1037.1970000000001