condition mean min max ZT0-3 0.321543492 0.128024514 0.5150624699999999 ZT4-7 0.9855750645000001 0.7400296735 1.2311204555000002 ZT8-11 1.123701031 1.013669442 1.23373262 ZT12-15 0.9931132215 0.761196356 1.225030087 ZT16-19 2.4470016175 1.89819246 2.995810775 ZT20-23 2.5030712252500003 2.0790120385 2.9271304120000003