condition mean min max ZT0-3 127.616672 127.616672 127.616672 ZT4-7 115.3082545 115.3082545 115.3082545 ZT8-11 109.582176 109.582176 109.582176 ZT12-15 135.7422285 135.7422285 135.7422285 ZT16-19 141.12499350000002 141.12499350000002 141.12499350000002 ZT20-23 144.044914 144.044914 144.044914