Claima7d7edacf8d4e61084f987b3f03d6462d08aeb815abb2bba2dd6e53b13ad4b02·Why does the block chi-squared carry the 4M factor?

Claim

The block frequency test's statistic is χ²(obs) = 4M Σ(πi − 1/2)², referred to a χ² distribution with N degrees of freedom (SP 800-22 rev 1a §3.2, p. 64).

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The block frequency test's statistic is χ²(obs) = 4M Σ(πi − 1/2)², referred to a χ² distribution with N degrees of freedom (SP 800-22 rev 1a §3.2, p. 64).untested-default

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