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Questions tagged [comparison]

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22 views

How to compare two PCAs

I am working on a deep learning research and came across the following problem: I have a network (let's call it A) that performs a certain task with X% ...
12 views

Use Effect Size VS p-Value when determining the best fitting distribution?

I have a large sample size of about 50,000 I want to determine what theoretical distribution fits the distribution of my samples the best. What I did is to fit all distributions I know to the data ...
9 views

Inference from small sample size with aggregated country data

I have a data set with country aggregate patient data for yearly total number of diseases, treatments provided by health services, and some other covariates for two countries over 10 years. The ...
1k views

How to measure the statistical “distance” between two frequency distributions?

I am undertaking a data analysis project which involves investigating website usage times over the course of the year. What I would like to do is compare how "consistent" the usage patterns are, say, ...
26 views

Which statistical analysis test is more appropriate to calculate p-value?

I am trying to determine if the increases seen in gene expression from a certain time-point to another are significant or due to biological variation. I know that I should calculate the p-value but I ...
682 views

Bayes-Poincaré solution to the Behrens-Fisher problem 2: calculations for Jeffreys’ priors [closed]

In a previous post Bayes-Poincaré solution to k-sample tests for comparison and the Behrens-Fisher problem?, the classical Bayesian and likelihoodist solutions to 2-sample tests for comparison and the ...
20 views

Is covariate significant in logistic regression

Im going to investigate if a disease have a negative impact on the development of children. The disease is the independent variable with additionally confounders. Tests from the study have shown ...
30 views

What's does “group size” mean when comparing correlations?

I have a very naive questions when it comes to comparing correlations. I want to compare two correlations using the cocor package in R. The two correlations show ...
23 views

ANOVA comparison between genders controlling for additional factor

I am interested in finding out exam results differ between gender, controlling for the school the students attended. For now i have done ANOVA comparison of exam results. There are significant ...
17 views

Choosing data to compare collected data against

I currently have a sample of 30 data points of how long a specific process takes to complete when a particular issue occurs and am looking to compare these times to the times where it doesn't happen ...
30 views

Comparing the difference between two mean differences (x1 - y1) vs. (x1 - y2)?

Could I get advice on what statistical test is most appropriate assuming the data conform to assumptions made when running parametric tests. I have conducted a study with 4 conditions (one control, ...
805 views

Bayes-Poincaré solution to k-sample tests for comparison and the Behrens-Fisher problem?

I’d like to share and submit for (dis)approval and discussion yet another, simple but original (to the best of my knowledge) Bayesian solution to the classical problem of comparing k samples or groups,...
47 views

How to compare two bayesian linear models?

Let say, we have two bayesian linear models learned from some data (not necessarily same but from the same data distribution), how can we compare or what is the notion of similarity between the two ...
26 views

Comparison of explaned variances in PCA

I computed a PCA and am interestet in the explained variance of the first unrotated component. The same procedure was used in a previous study. Question: How do I test whether the two explaned ...
18 views

Which statisical test to use when comparing a subgroup to a total group?

Currently I am evaluation my the results of my research. Now I am trying to find a statistical test to test the significance between two groups. However I can't seem to find what how to achieve this. ...
13 views

How to compare growth percentages between 2 groups?

I am comparing the growth rates/percentages of 2 companies. They have different initial customer bases which is why I'm not comparing means using standard statistical tests. Company A had 335 ...
16 views

Comparing fixed intercepts of different mixed models R

Given 3 variables: y is continuous, x is continuous, z is a repeated measures factor, nested within subjects. I have two models from different data sets a and b: fitm1 <- lme(y ~ x + z, random = ~...
26 views

Test to compare means of non independent samples with repeated measures

I am struggling a little to know if I am comparing independent or not independent data and I am not sure what kind of test I should use. Here is the pitch : I would like to compare latencies between ...
8 views

How to design study for comparing two settings in one session?

We designed a study to test the effectiveness of our interaction technique. Our technique forces a subjects hand, so that there some different force distribution in case of experiment setting 1, ...
18 views

How does the rejection sampling method work in layman's terms?

Suppose that I have no knowledge of sampling methods and that I have some knowledge of probability theory (e.g. probability distribution and marginal distribution). How would you explain the ...
25 views

Sample Size Experiment Proportion Failure

I have N machines and I want to implement an experiment E in them in order to improve their proportion of failures. However, I’m not sure yet if this experiment E will increase, decrease or do ...
21 views

Sample Size Proportion Comparison Test Finite Population

How can I calculate sample sizes for a Prorportion Comparison Teste of Finite Populations? Is there a function in R? Basically, I want to know what is the finite population version formula for the ...
20 views

Comparing two groups (nested) and differences between multiple dependent variables (nominal and continuous)

What is the best method to compare two groups in this situation? For example, lets say I want to compare and find differences between men and women. The independent variables can be nominal (own a car,...
11 views

Ways to compare Likert ratings with non-equal total response count

I have Likert response data like this in which the surveyor asked 188 raters to rate on a 1-5 Likert scale for 6 different stories with the question, "I'd like to hear more stories like this". Some of ...
28 views

Comparing 3 raster maps of continuous surface data in R

I have 3 maps representing spatial distribution in hunting pressure. These maps were derived using different methods and I am now interested in comparing them to assess how they might differ/agree ...
9 views

Comparison of multiple spatial model predicted outputs

I am performing some species distribution model comparisons under different sampling strategies. I have two sampling constraints with five levels (e.g. presence sample sizes), for a total of 25 ...
16 views

Comparing gas pipe failure rates by soil type

I'm trying to establish whether certain soil types are associated with (statistically significant) higher rates of gas pipe failure. I have a set of polygons representing different soil ...
24 views

How to compare predictions made by two different models?

Please help me understand this: There's something called the MAGGIC Risk Calculator for Heart Failure for predicting adverse outcomes in patients with heart failure....
24 views

Comparing the mean of predicted values for a misspecified model against the mean of the observed values

I have a regression that I have run on average ratings for some products (dependent variable) and their characteristics (Model 1). I have reason to believe there is a prejudice against a specific set ...
11 views

comparison of two independent data of same location using statistical test

I have elevation values of a geographical area with their lattitude and longitude, derived from two different satellites. How can I compare these data using some statiscal test?
20 views

How to compare two random intercept beta regression model for one predictor on two different outcomes?

I have a clustered data set ,where two outcomes variables are rate/proportion type (Y1, Y2) and a binary predictor variable (X1). I am fitting random intercept beta regression for adjusting the ...
252 views

How to compare two mediation models?

I ran a mediation study using three dispositional measures, each measured with a scale. The order of scales was in line with my assumed model, so A --> B --> C. Using SPSS and PROCESS the results ...
20 views

Determine performance difference after software changes

Situation: For our software package, I want to check if there is performance degradation after software changes. Therefore we measure multiple operations and save the duration in milliseconds. There ...
I have the next problem: I need to compare three treatments $A, B$ and $C$ for a type of pain. Every treatment has been used in 10 different patients. and every treatment is measured with two ...