condition mean min max ZT0-3 7.820169999999999 7.820169999999999 7.820169999999999 ZT4-7 6.037425 6.037425 6.037425 ZT8-11 5.79619 5.79619 5.79619 ZT12-15 6.297 6.297 6.297 ZT16-19 10.4859 10.4859 10.4859 ZT20-23 8.675844999999999 8.675844999999999 8.675844999999999