Questions tagged [paired-data]
Paired data arise when an experimental or observational study design deliberately samples two units as a dyad to form a basis of comparison. Use this tag for any question about paired data or their analysis.
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Assessing the Implementation and Performance of a New Biomarker in Cancer Surveillance
In a surveillance program designed to detect a specific type of cancer in a high-risk population, both biomarker A and ultrasound (US) are used semi-annually. If either A or US returns a positive ...
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What is the appropriate test comparing two groups with pre-post design?
I have two groups (control and experimental), both have pre- and post-test scores.
A colleague of mine suggested that I use a one-way MANOVA to test the effectiveness of the intervention, with pre- ...
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Paired Non-parametric test with more than 3 groups but just two timepoints
I may not have found the right term to search for, so I am asking what might be a straightforward question:
Assume we have an experiment with paired non-normal distributed data, called "Pre" ...
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Combining Data from Multiple Participants for Statistical Analysis of a Facial Expression Memory Task
Context of the Query: I am working on a project involving a memory task for facial expressions, consisting of two phases:
Encoding Phase: In this phase, participants are exposed to 8 virtual ...
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What is the correct sample size for the purposes of this test?
$X_i$, $i = 1, \ldots, n_X$, are i.i.d. from some distribution; and $Y_j$, $j = 1, \ldots, n_Y$, are i.i.d. from some other distribution. Consider all pairs $(X_i, Y_j)$. The number of pairs is $n=n_X ...
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Bland-Altman plot for Heart rate measurements (bpm) follow certain 'line' patterns
I'm comparing heart rate measurements of different devices during different periods of activity (5 min resting, 5 min exercise and 5 min recovery).
To analyse the agreement between devices, I want to ...
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Calculating variance between paired samples, where one sample is constrained to always be the lower bound?
I'm sure this is a solved question, but I haven't been able to hit on the right search terms.
Suppose I have paired samples A and B. A represents a derived variable (say distance "as-the-crow-...
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Is it better to perform multiple paired t-test or One-Way ANOVA test
I have 7 patients with blood measurements from two different tissues and at two different oxygenation states. We first took measurements from tissue A and B (Normoxia) and then we administrated oxygen ...
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How to compare two PMF generating functions?
I have two functions $f$ and $g$ that map an input vector $x_i$ to a probability mass function.
For example:
$$
x_i = [0,1,2] \\\\
f(x_i) \rightarrow [0.1, 0.3, 0.2, 0.2, 0.2] \\\\
g(x_i) \...
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Ancova or other test?
I am struggling to select the correct type of test for my data and would like to eventually run it in R. The design is as follows:
A treatment vs control group of plants
From each plant the following ...
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"paired" comparison of more than two algorithms
When comparing two algorithms $A$ and $B$ on test data $x_1,\ldots,x_n$ by means of a performance measure that yields $A(x_i)$ and $B(x_i)$, there are two standard methods:
Check whether $\frac{1}{n}\...
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Sample size. Paired T-Test and repeatability
The study involves 10 subjects, in which we measure speed with 4 different shoes, and the measurements are repeated 4 times, and this is done on two different tracks, indoor and outdoor.
On the one ...
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Is there an way to model random effects in a design that is typically analyzed by the McNemar test?
My question is: if in a study with paired binary response data (where McNemar test is often used) we can use the exact binomial test to test the odds ratio, is it possible to model the same odds ratio ...
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Can Wilcoxon be used in large sample with non-normal distribution?
I am doing my undergrad research, aiming to know the difference of before and after an intervention.
our sample size is 37 which is already considered as a large sample right?
However, when we test ...
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How to compare the mean of different variables?
I am working on factors causing culture shock. I designed a questionnaire regarding 7 different factors which could be the cause of culture shock. I calculated the mean of each factor by averaging the ...
