Free Runs Test Calculator

Test whether a binary sequence is random using the Wald-Wolfowitz runs test.

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Expected Runs

13.0000

Std Dev2.3452
Z Statistic-2.1320

Expected Runs vs Count Type A

View formula & how it works →

Wald-Wolfowitz Runs Test

mu = 1 + 2*n1*n2/(n1+n2)

Tests randomness of binary sequences.

Example Calculation

15 As, 10 Bs, 8 runs.

  1. 01Expected = 13
  2. 02Z = -2.15, not random

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