condition mean min max ZT0-3 257.82476 257.82476 257.82476 ZT4-7 215.733291 215.733291 215.733291 ZT8-11 196.79920900000002 196.79920900000002 196.79920900000002 ZT12-15 219.750139 219.750139 219.750139 ZT16-19 209.03234 209.03234 209.03234 ZT20-23 230.41826700000001 230.41826700000001 230.41826700000001