condition mean min max ZT0-3 0.6225008333333334 0.1792705 1.12355 ZT4-7 1.061195 1.061195 1.061195 ZT8-11 0.2281385 0.2281385 0.2281385 ZT12-15 0.5828975 0.3821245 0.7836704999999999 ZT16-19 0.353722 0.353722 0.353722 ZT20-23 0.0 0.0 0.0