condition mean min max ZT0-3 8.454910000000002 8.30681 8.603010000000001 ZT4-7 6.371175 6.371175 6.371175 ZT8-11 6.38256 6.38256 6.38256 ZT12-15 0 0 0 ZT16-19 6.29826 6.29826 6.29826 ZT20-23 7.25748 7.25748 7.25748