CAST: Canvass Audits by Sampling and Testing

  title={CAST: Canvass Audits by Sampling and Testing},
  author={Philip B. Stark},
  journal={IEEE Transactions on Information Forensics and Security},
Canvass audit by sampling and testing (CAST) is a method to decide on the basis of a hand count of a random sample of batches of ballots whether to count the entire audit trail of a contest by hand. Data are collected in stages. At stage s, one computes Ps , an upper bound on the P-value of the hypothesis that the apparent outcome is wrong, conditional on the results of previous audit stages. If Ps is less than a threshold alphas-strong evidence that the apparent outcome is correct-the audit… CONTINUE READING
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