condition mean min max ZT0-3 11.137767499999999 10.639275 11.63626 ZT4-7 10.88585 10.88585 10.88585 ZT8-11 19.2481 19.2481 19.2481 ZT12-15 0 0 0 ZT16-19 19.3927 19.3927 19.3927 ZT20-23 14.623249999999999 14.623249999999999 14.623249999999999