Yate’s correction for continuity

• In the 2 test, we are using a discrete statistic which
  is approx by a continuous 2 distribution. To correct
  for the use of the discrete statistic, a correction is
  applied to the original 2 value to improve the fit


• Yate’s correction for continuity is particularly useful
  when dealing with small sample size studies


• Yate’s correction does not apply to contingency
  tables larger than 2x2. For non-2x2 tables, low cell
  frequencies are resolved by pooling (collapsing)
  adjacent cells

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exp

2 (|obs exp |^0.^5 )^2

c