class_docstr: Class for results of tests of linear restrictions on coefficients in a model.
  
  This class functions mainly as a container for `t_test`, `f_test` and
  `wald_test` for the parameters of a model.
  
  The attributes depend on the statistical test and are either based on the
  normal, the t, the F or the chisquare distribution.
class_docstr_tok: ["Class","for","results","of","tests","of","linear","restrictions","on","coefficients","in","a","model",".","This","class","functions","mainly","as","a","container","for","`","t_test","`",",","`","f_test","`","and","`","wald_test","`","for","the","parameters","of","a","model",".","The","attributes","depend","on","the","statistical","test","and","are","either","based","on","the","normal",",","the","t",",","the","F","or","the","chisquare","distribution","."]
code: def __str__(self):
      return self.summary().__str__()
  
imports: import numpy
  from scipy.stats import f
  from scipy.stats import t
  from scipy import stats
  from statsmodels.tools.tools import clean0, fullrank
  from statsmodels.stats.multitest import multipletests
label_desc: Use image node_id 3 for calling the ContrastResults obj's underlying member method code with example usage: obj.__str__() and returns: self