bkg,   bkg err,       sig,   sig err,      data,  data err
    7.6829,    5.6406,    3.6731,    0.0215,        — ,        — 
   11.6237,    1.8385,    0.6636,    0.0091,        10,    3.1623
   45.6719,    7.5374,    0.2872,    0.0059,        71,    8.4261
  553.5966,   31.3488,    0.2311,    0.0054,       645,   25.3969

MC pred_A_count = 0.96
MC pred_A_error = 0.23
Data pred_A_count = 1.10
Data pred_A_error = 0.37