condition mean min max ZT0-3 10.56655 10.56655 10.56655 ZT4-7 7.01982 7.01982 7.01982 ZT8-11 5.685415000000001 5.685415000000001 5.685415000000001 ZT12-15 8.064405 8.064405 8.064405 ZT16-19 9.27693 9.27693 9.27693 ZT20-23 12.345849999999999 12.345849999999999 12.345849999999999