condition mean min max ZT0-3 22.613882965000002 19.38666603 25.8410999 ZT4-7 13.7957819925 12.790037260000002 14.801526725 ZT8-11 11.47457399475 11.152070869500001 11.797077119999999 ZT12-15 5.4983882975 4.9270059925 6.0697706025 ZT16-19 6.95704019875 6.000266385 7.9138140125 ZT20-23 7.11759316875 6.72747723 7.5077091075