condition mean min max ZT0-3 181.65766666666667 160.05700000000002 192.56150000000002 ZT4-7 137.4115 137.4115 137.4115 ZT8-11 158.6445 158.6445 158.6445 ZT12-15 215.36775 201.952 228.7835 ZT16-19 219.91 219.91 219.91 ZT20-23 185.59750000000003 185.59750000000003 185.59750000000003