condition mean min max ZT0-3 322.225728175 297.16769495000005 347.28376139999995 ZT4-7 48.016135934999994 31.697738905 64.334532965 ZT8-11 59.43501338499999 34.34187454 84.52815222999999 ZT12-15 84.762569355 82.269090405 87.256048305 ZT16-19 126.846989575 121.05294755 132.6410316 ZT20-23 170.35037527499998 168.75157525 171.94917529999998