condition mean min max ZT0-3 0.74858225 0.743153 0.7540115000000001 ZT4-7 0.6164855 0.6164855 0.6164855 ZT8-11 1.72546 1.72546 1.72546 ZT12-15 0 0 0 ZT16-19 1.774105 1.774105 1.774105 ZT20-23 1.2780399999999998 1.2780399999999998 1.2780399999999998