Ignoring standard deviations
      a  =    1.079574       uncertainty:  0.099821 
      b  =   -2.006663       uncertainty:  0.017161 
      chi-squared:       24.047945 
      goodness-of-fit:    1.000000 

Including standard deviations
      a  =    1.079574       uncertainty:  0.100755 
      b  =   -2.006663       uncertainty:  0.017321 
      chi-squared:       96.191780 
      goodness-of-fit:    0.532773