condition mean min max ZT0-3 0.2895358333333333 0.19384099999999999 0.4314175 ZT4-7 0.240479 0.240479 0.240479 ZT8-11 0.0 0.0 0.0 ZT12-15 0.42191575000000003 0.376102 0.4677295 ZT16-19 0.527223 0.527223 0.527223 ZT20-23 0.462823 0.462823 0.462823