Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [comparison]

109 questions
18
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3 answers

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, how close they are to a pattern which involves…
user258128
5
votes
0 answers

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

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 Behrens-Fisher problem have been analyzed and…
user193726
4
votes
1 answer

Probability that the absolute value of a normal distribution is greater than another

Greatly appreciate anyone that is willing to Help. I am thinking about the question of comparing the absolute value of normal distributions. Given $a > b$, $X$ ~ $N(0,a)$ and $Y$ ~ $N(0,b)$, what is the distribution of $|X| - |Y|$?
Davidson Cheng
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4
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1 answer

Comparing two sensors timeseries that measure the same variable

I have data on one station provided by two sensors that measure solar radiation, let's call A and B where A is the more accurate and the B the less accurate one. The plot show data from one hour measured by both sensors. The frequency of the…
Nicolas Branco
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4
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1 answer

Comparison / Selection of covariance structures - linear mixed model in SPSS

Hi together, I am currently trying to build a linear mixed model with repeated measurements in SPSS. I would expect that the correlation between my measurements is highest at adjacent time points, so my guess was that AR1 (autoregressive structure)…
Vinc G
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4
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1 answer

Model specification for a multiple regression

I would like compare the job satisfaction between two industries. I've conducted a t-test and came to the conclusion that they are statistically different at the 5% significance level. Now I would like to analyze how professional and demographic…
user283542
4
votes
1 answer

Which is a better estimator, averaged functions vs. A function of an average?

Problem: Assume that we want to estimate $f(\theta)$ with a pre-specified strictly increasing function $f$ and a parameter $\theta$. Let $\hat{\theta}_1$ and $\hat{\theta}_2$ be unbiased estimators for $\theta$. My question is to compare which…
inmybrain
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4
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1 answer

Formal proof of Occam's razor for nested models

I consider 2 models $M_0$ and $M_1$, $M_1$ being more complicated than $M_0$ in the sense that it has more parameters (I usually assume than $M_0$ is nested within $M_1$). They are respectively parametrized by $\theta_0$ and $\theta_1$. I assume…
Camille Gontier
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4
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0 answers

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, with the famous Behrens-Fisher problem (in its…
user193726
3
votes
0 answers

Comparison of variances with multiple factors using fligner kileen test

Hope my question fits in here and I have described everything well enough. Somehow I cant quite get my head around it. I have a data set with pesticide residue data in flowers, which had been obtained from using two different application techniques…
Fee
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3
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1 answer

How to compare the same variable using models with different covariates?

I have measures from an epigenetic variable from two different groups (Treatment and control) measured in two different tissues. I have identified differences for this epigenetic variables between Treatment and control groups (Group) in each tissue…
Brenda
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3
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1 answer

Comparing model performance: do fixed and random effect regression models give different model ranking?

I am a graduate student in animal science. I am comparing linear models that fit covariates of var1 and var2. These two covariates are decomposed from one quantity say F (inbreeding level of animal). I decomposed F based on the cut-off number of…
Pattrapoljk Sumreddee
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3
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0 answers

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 disease variable is categorical with 10 different…
Wissenschaft
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3
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2 answers

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 models? For example, consider two bayesian linear…
randomprime
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2
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1 answer

How to compare two quantities with uncertainties?

I've got two instruments that measure one quantity. One of them is regarded to be more precise, therefore, I use this measurement as a reference. Then, I take two measurements of the same quantity using completely different method. I want to compare…
dowkie
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