[Feature Request] Yates correction for chi-squared test

[bvenn]

Description

Pearson's chi-squared test allows the determination if two distributions differ from each other. If an expected value is below 5, a correction for small numbers should be made.

• Yates' corrections
• William's corrections

References

https://www.ling.upenn.edu/~clight/chisquared.htm https://en.wikipedia.org/wiki/Chi-squared_test#Yates's_correction_for_continuity