yates's correction for chqTest

[ArunS-tack]

closes #194.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +3.73 🎉

Comparison is base (e03407a) 90.04% compared to head (86e4014) 93.77%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #286      +/-   ##
==========================================
+ Coverage   90.04%   93.77%   +3.73%     
==========================================
  Files          28       28              
  Lines        1467     1736     +269     
==========================================
+ Hits         1321     1628     +307     
+ Misses        146      108      -38     

Impacted Files	Coverage Δ
src/power_divergence.jl	98.52% <100.00%> (-0.86%)	⬇️
src/f.jl	66.66% <0.00%> (ø)
src/common.jl	100.00% <0.00%> (ø)
src/var_equality.jl	98.24% <0.00%> (+0.24%)	⬆️
src/permutation.jl	80.00% <0.00%> (+0.83%)	⬆️
src/anderson_darling.jl	88.43% <0.00%> (+0.93%)	⬆️
src/HypothesisTests.jl	83.33% <0.00%> (+1.07%)	⬆️
src/durbin_watson.jl	98.91% <0.00%> (+1.47%)	⬆️
src/augmented_dickey_fuller.jl	93.15% <0.00%> (+1.84%)	⬆️
... and 19 more

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