condition mean min max ZT0-3 1.7367275000000002 1.56098 1.9124750000000001 ZT4-7 7.934970000000001 7.934970000000001 7.934970000000001 ZT8-11 9.136635 9.136635 9.136635 ZT12-15 0 0 0 ZT16-19 2.04351 2.04351 2.04351 ZT20-23 2.136295 2.136295 2.136295