condition mean min max ZT0-3 177.33725 152.7665 201.90800000000002 ZT4-7 46.1152 46.1152 46.1152 ZT8-11 10.957175 10.957175 10.957175 ZT12-15 0 0 0 ZT16-19 33.91395 33.91395 33.91395 ZT20-23 80.2429 80.2429 80.2429