condition mean min max ZT0-3 560.9733333333334 394.5135 741.0 ZT4-7 1327.175 1327.175 1327.175 ZT8-11 668.712 668.712 668.712 ZT12-15 1042.6164999999999 482.593 1602.6399999999999 ZT16-19 1257.71 1257.71 1257.71 ZT20-23 854.4639999999999 854.4639999999999 854.4639999999999