Questions tagged [mcnemar-test]

A test for dependent categorical data, such as yes/no data before & after a treatment. The McNemar-Bowker test generalizes McNemar's test for $k>2$ categories. The tests assess whether the population proportions in each pair of corresponding symmetric cells are equal.

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4answers
41k views

What is the difference between McNemar's test and the chi-squared test, and how do you know when to use each?

I have tried reading up on different sources, but I am still not clear what test would be the appropriate in my case. There are three different questions I am asking about my dataset: The subjects ...
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1answer
258 views

Compare classification performance of two heuristics

I want to compare the classification performance of two heuristics: $h_0$ and $h_1$. I have around 700 samples for which I know the output class $c$ and the results of the two heuristics $c_{\textit{...
5
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2answers
461 views

Can McNemar's test be improved upon by adjustments for zeros like those in a sign test?

McNemar's test is a special example of the binomial sign test, but the ('vanilla') sign test suffers from bias due to ignoring differences equal to zero. McNemar's test statistic is given by: $\chi^{...
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1answer
1k views

How to calculate information included in R's confusion matrix

I want know the formulas for the information highlighted in the confusion matrix in the picture below:
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2answers
2k views

Relationship between McNemar's test and conditional logistic regression

I am interested in the modeling of binary response data in paired observations. We aim to make inference about the effectiveness of a pre-post intervention in a group, potentially adjusting for ...
4
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1answer
10k views

McNemar-Bowker test for comparison of two measures

I am comparing two versions of a survey (an original, and a modified) and was wondering if the McNemar-Bowker test is appropriate. The survey(s) ask respondents to indicate whether they've had an ...
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0answers
241 views

How do I get an odds ratio with McNemar's test?

I have pre and post test data evaluating the effectiveness of a lesson about how to help friends who are being bullied. I am trying to see if more students know how to help a friend being bullied ...
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1answer
600 views

mcNemar's Test how to compare two proportions in dependent sample

I would like to compare the false positive rates (1 - specificity) from two different tests within the same sample. The false positive rate is calculated by comparing the test values against the ...
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0answers
914 views

Alternatives to McNemar-Bowker test when symmetrical cells have zero count in contingency matrix

I need to test the difference between pre- and post- intervention over a 4-grades parameter computed on 57 samples. The contingency matrix on which I need to compute a McNemar test for paired data (...
9
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4answers
4k views

Fisher exact test on paired data

Given $40$ cases with lung cancer and $40$ matched controls (without lung cancer) (matching based on age, sex, etc.). To try to find evidence between the effect of smoking on lung cancer, I used ...
5
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2answers
353 views

Can Cramér's V be used an effect size measure for McNemar's test?

I'm using McNemar's exact test (with R's "mcnemar.exact" function). I know that giving the odds ratio or proportion would be an adequate measure of effect size (Effect size of McNemar's Test), but ...
5
votes
3answers
582 views

Why aren't the diagonal counts used in McNemar's test?

In reviewing McNemar's test, I see that the diagonal counts aren't used in computing the test statistic. However, since the test is testing the null that the row and column marginals are equal, ...
3
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1answer
649 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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1answer
4k views

Paired comparison chi square

I have a question related to the use of chi square test for paired data. I have read that McNemar tests would be an option but in some software like R it works only for 2x2 data (may be I do not know ...
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1answer
563 views

Comparing two decision models using McNemar's test

I'm trying to compare the performance of two classification algorithms. Thanks to CrossValidated, I already know that the best way to do this is via McNemar's test. I performed this, and sure enough, ...