condition mean min max ZT0-3 14.99855 14.99855 14.99855 ZT4-7 14.73375 14.73375 14.73375 ZT8-11 13.23605 13.23605 13.23605 ZT12-15 13.2041 13.2041 13.2041 ZT16-19 18.04405 18.04405 18.04405 ZT20-23 16.580550000000002 16.580550000000002 16.580550000000002