condition mean min max ZT0-3 87.995667 87.995667 87.995667 ZT4-7 83.237218 83.237218 83.237218 ZT8-11 214.614622 214.614622 214.614622 ZT12-15 224.82277349999998 224.82277349999998 224.82277349999998 ZT16-19 127.57823149999999 127.57823149999999 127.57823149999999 ZT20-23 135.7441645 135.7441645 135.7441645