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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1answer
14 views

Statistical test for difference-hypothesis with dichotomous dependent and independent variables

I need your help. I'm designing a study for the following problem. There is a feature A (implemented by many software from my specific context) and I'm 100% sure that if I ask the users they will ...
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12 views

Is it reasonable to do a test of marginal homogenity (mcnemar-bowker) when some combinations of the cells cannot possibly occur?

I have some patients that have none, mild and moderate form of a disease monitored at baseline and at 6-months. I would like to do the mcNemar-bowker test to see whether the drug given to everyone has ...
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52 views

What statistical test would I use to test that both data sources are matching [closed]

Suppose I am only working with two datasets, Data Source 1 with columns Customer ID and ...
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52 views

NcNemar's test for 1:2 matched data

Does anyone use McNemar's test for fractional values after 1-to-2 propensity score matching? How correct would it be? For instance, let me have 0-1 outcomes and the following matched observations (...
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1answer
198 views

Which test to use? Repeated measures with binary outcomes

I would like your opinion about which analyses to use for the research question. I've got a repeated measures with binary data. N = 20 H0 = there is no difference between pre and post measurement ...
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1answer
274 views

Test if treatment effect is different between samples

I want to determine if there is significant variation in the effect of a treatment amongst my replicates. The treatment effect is measured as a proportion. Let me describe: I study heart defects (in ...
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7 views

When comparing classificators, is McNemar's test applied to the output or to the hits?

Suppose I have the following output, alongside the ground-truth ($GT$), for two classifiers $C_1$ and $C_2$: ...
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1answer
26 views

Single Group Pre-Post McNemar Table Set Up

I am looking to evaluate if the change in proportion for a group changed pre-to-post intervention. Essentially, is the ~7% increase from pre (~2%) to post (~9%) significant. I am running the McNemar ...
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1answer
297 views

Is there a Bowker-like test to assess the symmetry of squared contingency tables with small expected values and a small number of observations?

I ask this question because Bowker test (McNemar extension for $k\times k$ tables with $k>2$) requires a large number of observations for fitting well and also requires (as a rule of thumb) that ...
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1answer
26 views

Chi-square based tests tending to zero for large sample sizes [duplicate]

I think I have some misconception about chi-square based tests such as Pearson's test or McNemar's test. The way the tests are defined, the test statistics produced by the formulas are not stable ...
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74 views

McNemar or Cochran's Q for evaluating multiclass classifiers?

full disclosure: I did a semi-cross post of this question due to low traffic. Once I get an answer on any of the two questions, I will link the answer back to the respective other. tl;dr For ...
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115 views

Difference in insight gained from Cohens' Kappa vs McNemar

I would like to understand the difference in what a test with Cohen's Kappa tells you about your data compared to what McNemar's test tells you. If Cohen's Kappa measures agreement between two ...
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810 views

One-sided McNemar's test

In R, the function mcnemar.test has the following example: ...
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45 views

Can I perform a McNemar's test with only proportion and denominator information?

I have the following count and denominator information. The 630 subjects are the same people over two different periods of time. Can I conduct a McNemar's test to compare the dependent proportion ...
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1answer
264 views

Paired binary data with a zero cell

How do you analyse and obtain a p-value from a 2*2 table examining a binary outcome that is paired, when one cell has zero events? To clarify, I was looking at the success rate of obtaining an ...
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1answer
37 views

Conditional Exact Logistic Regression

I have paired data for two tests. I would like to say that Test A is more sensitive than Best B, but not sure if I'm using the correct methods or if my data support it. I know McNemar's Exact test can ...
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22 views

Hypothesis testing with two dependent multilevel categorical variables [closed]

I was presented with a requirement of comparing two sources of diagnoses on the same subjects, resulting in two 4-level categorical variables. I offered to calculate Cohen's Kappa, but the interested ...
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1answer
100 views

Comparison of proportions using McNemar's Chi-Square using Pre- and Post- data for two disease conditions

This question follows-up on the post: What is the difference between McNemar's test and the chi-squared test, and how do you know when to use each? I am examining a pre- and post- intervention data ...
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1answer
65 views

Multiple Observations per Subject per Time-point analysis?

I am having a difficult time finding an appropriate test for my analysis. Please help - In my study I have 130 participants who were tested with a binary outcome (pass [1] /fail [0]) before and ...
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47 views

comparing sensitivities

We want to compare two sampling methods. All patients will go through a DNA test for diagnosis(positive or negative). Then samples are taken to identify the determine the type of bacteria and ...
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1answer
49 views

Comparing proportions from overlapping samples

I'm looking to compare the read rate of an email newsletter with the read rate of another newsletter. However, many (not all) of the people who receive one newsletter also receive the other. What ...
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304 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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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 ...
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91 views

Hypothesis test for intervention with class imbalance before intervention. Alternative to McNemar

I want to assess an intervention to cure a disease. An example is described by the following matrix: ...
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5k views

Importance of McNemar test in caret::confusionMatrix

There are many metrics to evaluate the performance of predictive model. Many of these appear relatively straightforward to me (e.g. Accuracy, Kappa, AUC-ROC, etc.) but I am uncertain regarding the ...
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48 views

One-tailed test for comparing paired dichotomous responses

Given reference samples $R_i$, I have two dichotomous responses $X_i$ and $Y_i$ I wish to compare. Each dichotomous response (relevant vs. irrelevant to the reference $R_i$) is generated by an ...
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1answer
37 views

Use of Chi Square for only semi-independent sample?

I ran a study for my Master's thesis that counted the number of people who attended different courses that were advertised in different ways, and how many passed/failed each. I used a Chi Square ...
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26 views

Which test to use when comparing diagnostic performance of doctors with and without a computer assisted diagnostic support tool?

This will seem very basic so my apologies. Lets say I have 10 doctors who are inexperienced diagnosing cancer in 100 patients. 50 patients have cancer and the other 50 do not. The doctors provide a ...
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1answer
671 views

Mcnemar's test p-value output in R confusion matrix

I am using the R caret package to build a randomforest classifier model for plant data. The dataset has 7 variables - all numeric which are being used to predict if a plant will "grow" or "not grow"....
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89 views

How to Control Familywise Error Rate in a series of Planned McNemar Comparisons

I have paired binary responses from same subjects under 9 different conditions. I conducted Cochran's Q which indicated that there significantly different pairs exist. I want to follow up but NOT ...
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458 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 ...
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144 views

Relationship between statistical models: mcnemar test vs logistic regression

I always find useful and reliable answers in this forum and I hope this pattern will not change this time. I was spending some time to check whether an intervention program had any effect on an ...
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2answers
47 views

Most appropriate test to assess difference between categorical variables? Chi2 or Stuart-Maxwell?

I am trying to determine the most appropriate test for parts of my dataset. I have been using a $\chi^2$ test, but I am now realising it might not be the most appropriate. I am using Stata. I have a ...
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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
229 views

Sample size and number of events limitations for McNemar's test

What are sample size and number of events low limits for a proper application of McNemar's test with continuity correction? When must I use McNemar's exact test?
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800 views

Compare a diagnostic test to gold standard

I have a sample of patients who underwent 2 diagnostic tests, one of which is the gold standard. I've been asked to test if the diagnosis from the experimental test is different than the one from the ...
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827 views

McNemar or Fisher exact test for propensity score matched data?

I want to analyze some propensity score matched data. In the literature McNemar test is usually used, since the data is "paired". However matching is not pairing in the common sense. Would it be ...
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2answers
79 views

t-test/chi squarred test or mcnemar test?

To what extent does the effect of presence of music differ for the concentration ability in playing a memory recall game in males and females? So basically I had 50 students (25 females and 25 males) ...
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153 views

McNemar's test probably does not work, but what could?

I have a dataset of people who had back-to-back procedures and I have the whether or not polyps (precancerous lesions) removed during each procedure. ...
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1answer
203 views

McNemars Test Sample size calculation

I've searched for this particular question but i can't seem to find the right answer. Lets say i expect prob p01 = 0.2 and prob p10 = 0.3. I want a power of 0.8 and alpha of 0.05. This website: ...
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1answer
2k views

McNemar Test: Reporting Chi-Square?

I have performed a McNemar test for paired binomial variables in SPSS to see if the success rate(score 1) differs between the two conditions (the two variables: the before and after treatment ...
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51 views

Comparing “paired” proportions with different totals

I have long-term survey data for trees infected with a virus. The data was measured in 2000 and again in 2010. I'd like to compare the number of uninfected vs. infected trees in 2000 and 2010. However,...
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1answer
3k views

Fisher's exact test in 2x3 contingency table

I have a dataset with birds that were exposed to pesticides. The summary of this data looks like: ...
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30 views

Statistical test for testing different between groups in terms of efficiency in regression

During my thesis work I collected some measurements about chest compressions that reached a good depth (binomial data) during cardiopulmonary rescuscitaion (CPR), I have two groupes of volunteers and ...
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1answer
66 views

How to test difference of proportion in the same group of patients tested at two time points?

I have to calculate a sample size for a study in which patients are treated for a set period of time with a drug. Subsequently, responders are followed up (but not treated) for an additional period of ...
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422 views

Sample size determination for before/after study

I would like to estimate the required sample size for a study where I have subjects first undergo an observation (control) period of X months and then an intervention period of Y months. The outcome ...
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2answers
4k views

Determine if two proportions from the same sample are different

Is there a test I can use to compare two proportions from the same sample that are not mutually exclusive? For example, I would like see if the proportion of people that answered "yes" to a ...
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121 views

Does this meet the assumptions for McNemar's Test?

On the NIST page about McNemar's Test, the third listed assumption is that "The difference P(Xi = 0, Yi = 1) - P(Xi = 1, Yi = 0) is negative for all i or zero for all i or positive for all i." Let's ...
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37 views

Does sampling fraction matter for McNemar's Test?

For McNemar's Test, does the sample need to be less than 1/20 of the population if the sample is without replacement? If so, can I correct for a sample that is larger than 1/20 of the population by ...
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74 views

What would be appropriate test to compare two lists of dichotomous variables?

Colleagues, can't wrap my mind on simple question, please help! I have two products and list of their attributes. My respondents make an answer which product on each attribute they prefer. Finally ...