condition mean min max ZT0-3 14.446000000000002 14.446000000000002 14.446000000000002 ZT4-7 14.35665 14.35665 14.35665 ZT8-11 14.07855 14.07855 14.07855 ZT12-15 15.2432 15.2432 15.2432 ZT16-19 15.914750000000002 15.914750000000002 15.914750000000002 ZT20-23 14.2258 14.2258 14.2258