condition mean min max ZT0-3 5.455712500000001 5.025650000000001 5.885775000000001 ZT4-7 5.752643333333333 5.752643333333333 5.752643333333333 ZT8-11 11.6191 11.6191 11.6191 ZT12-15 14.784324999999999 14.679649999999999 14.889 ZT16-19 10.859015 8.404630000000001 13.3134 ZT20-23 0 0 0