# scipy.stats._result_classes.BinomTestResult.proportion_ci

BinomTestResult.proportion_ci(confidence_level=0.95, method='exact')

  Compute the confidence interval for `statistic`.

  Parameters:
    confidence_level float, optional

      Confidence level for the computed confidence interval of the estimated proportion. Default is 0.95.

    method{‘exact’, ‘wilson’, ‘wilsoncc’}, optional

      Selects the method used to compute the confidence interval for the estimate of the proportion:

      ‘exact’ :

        Use the Clopper-Pearson exact method [1].

      ‘wilson’ :

        Wilson’s method, without continuity correction ([2], [3]).

      ‘wilsoncc’ :

        Wilson’s method, with continuity correction ([2], [3]).

      Default is `'exact'`.

  Returns:
    ci `ConfidenceInterval` object

      The object has attributes `low` and `high` that hold the lower and upper bounds of the confidence interval.

  References

  [1]

  C. J. Clopper and E. S. Pearson, The use of confidence or fiducial limits illustrated in the case of the binomial, Biometrika, Vol. 26, No. 4, pp 404-413 (Dec. 1934).

  [2] (1,2)

  E. B. Wilson, Probable inference, the law of succession, and statistical inference, J. Amer. Stat. Assoc., 22, pp 209-212 (1927).

  [3] (1,2)

  Robert G. Newcombe, Two-sided confidence intervals for the single proportion: comparison of seven methods, Statistics in Medicine, 17, pp 857-872 (1998).

  Examples

      >>> from scipy.stats import binomtest
      >>> result = binomtest(k=7, n=50, p=0.1)
      >>> result.statistic
      0.14
      >>> result.proportion_ci()
      ConfidenceInterval(low=0.05819170033997342, high=0.26739600249700846)