Questions tagged [yates-correction]

A continuity correction applied to 2 by 2 contingency tables

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Application of Yates's correction in chi-square tests

There are a couple of points related to 'Yates's correction' I cannot figure out. Should I always do this correction when calculating the 'chi-square' criterion for 2x2 'contingency tables' (to ...
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408 views

Why is R automatically using Yates' correction?

I wanted to understand why R is always running Yates' correction for a 2$\times$2 contingency table. My strategy is to create some random 2$\times$2 contingency tables (let's say a thousand) and do X² ...
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170 views

Failed chi-square with Yates correction

I ran a textbook example in an Excel sheet - and replicated the answer. However when I retain the ratio, but double the sample size my result is not significant. This strikes me as illogical. Please ...
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252 views

Chi-2, test of independance, Yates correction in R

I'm trying to run chi square - test of independance. Between Category A that include values 1,2,3 and Category 2 that include values from 1 to 12. As you see, there is violation of the assumption ...
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718 views

Why Yates correction in McNemar's Test subtract 1?

McNemar's test statistic is given by: Yates's correction defines something like this: However, the correction for the McNemar's test statistic requires 1 (not 0.5)...
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764 views

Best sample size formula and continuity correction for tiny proportions?

I have found the following formulae (from http://www.itl.nist.gov/div898/handbook/prc/section2/prc242.htm) to estimate the sample size required to test the binomial proportion in a single sample. I ...
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924 views

Discrepancy between chi-square with Yates correction calculated by Excel and R

I am comparing observed counts with expected counts generated by assuming equal probability. My data, in R, are as follows: ...
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6k views

Exact formula Yates' correction in R

If I run a chi square in R with the Yates' correction, I get slightly different results from doing it by hand. What is the exact formula R is using for the Yates' correction? I use the simple code: ...
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227 views

Chi-square: naïve compensation for low frequencies

As far as I understood it, chi-square provides a measure for determining the similarity of the expected and observed (empirical and theoretical) distributions of nominal variables. It can be employed, ...
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1answer
67 views

Multinomial chi square with small expected values

I'm studying extinction in Austronesian languages, and am trying to find out if a subset of 384 languages is randomly selected with respect to extinction risk from a population of 1249 languages. "...
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1answer
3k views

Continuity correction for Pearson and McNemar's chi-square test

I think this is a rather basic question, but I just realize that I don't quite understand the term continuity correction. I use R and found the same syntax ...
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5k views

Yates' continuity correction in confidence interval returned by prop.test

This is the confidence interval estimated by prop.test ...
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11k views

Yates continuity correction for 2 x 2 contingency tables

I would like to gather input from people in the field about the Yates continuity correction for 2 x 2 contingency tables. The Wikipedia article mentions it may adjust too far, and is thus only used in ...
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1k views

Yates' correction for continuity only for 2X2?

Is the Yates' correction for continuity used only for 2X2 matrices?