condition mean min max ZT0-3 11.343417500000001 10.787935000000001 11.898900000000001 ZT4-7 6.2073350000000005 6.2073350000000005 6.2073350000000005 ZT8-11 9.176065 9.176065 9.176065 ZT12-15 0 0 0 ZT16-19 8.898565 8.898565 8.898565 ZT20-23 10.499295 10.499295 10.499295