Questions tagged [interpretation]

Refers generally to making substantive conclusions from the results of a statistical analysis.

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Interpretation of Adjusted Predictions Contrasts (Margins)

I would really appreciate some help with interpreting results for contrasts of adjusted predictions (I use Stata 15, margins command). I run an experiment and fitted a regression model comparing the ...
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26 views

Interpret Interaction Effects in Negative Binomial Regression

I have two questions regarding the interpretation of interaction effects in a negative binomial regression model. The model uses the number of people arriving at a hotel per hour as the dependent ...
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Interpretting johansen cointegration test results, help needed

so Im not really familiar with econometrics at all, and Im using this as a part of a University assignment. Basically I just want to know how to interpret this result from Gretl on whether there is a ...
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30 views

Interpretation of mixed-effects versus GEE poisson/logit regression parameters

What's the difference in the interpretation of the model parameters (intercept +slope) in the mixed-effects model and GEE model for poisson and logistic regression?
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What does it mean when there exists a treatment group by time effect?

In longitudinal analysis, mixed-models, gee, what does it mean when there's a group by time effect as opposed to only a time effect and treatment group effect? What does treatment group effect signify ...
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What's the rationale behind a normality test followed by a $t$-test?

Correct me if I'm wrong, but from my understanding, the standard procedure of testing whether data from an unknown source have a specific mean is to (a) perform a normality test to see if the data are ...
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Results Interpretation [closed]

Can someone help me interpret the results of this ANOVA, or tell me how to do it ?
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1answer
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Interpretation question about between-subjects effects in multilevel modeling

Specific question that (of course) comes from a reviewer. In multilevel models with: Level2=individuals Level1=within-persons Is it fair to say that, since these models explicitly estimate Level 2 ...
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Can I use RMSE as a percentage of error

I'm hoping someone can verify my assumption. I am building a regression model against an outcome variable which is a percentage. After tuning, the model outputs an RMSE estimate which I've looked to ...
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Regressing predictions on corresponding observed values, does that make any sense? If so, would this be a reasonable proposition?

I have a list with around 100 different dependent variables, for each of them I have around 35 observed values with 12 explanatory variables (it’s the same 12 explanatory variables for all dependent ...
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What I can know about my probability distribution from the below hypotesis test table?

I have computed the distribution fit test of my probability distribution i got it 0 , then I have tried to creat the hypothesis data for that distribution I have got the below table , Now am not ...
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Interpreting standard errors of linear regression with logged dependent variable

I'm running a linear regression with a logged dependent variable. This is the only variable in the model that is logged. For interpretation, I've exponentiated the coefficients, subtracted one, and ...
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1answer
27 views

Interpretation of learning curves - large gap between train and validation loss

I am trying to train a neural network to predict the quality (good or bad) of produced parts based on the parameters of the production (31 parameters). The network is trained with 121620 samples and ...
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how to interprete this acf and pacf plots

I am trying to interpret ACF and PACF plots correctly, after simulating a 500 long chronological serie following the MA(2) model, I got these ACF and PACF plots , This this mean MA(2) Model is ...
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Feature importance with nested cross-validation - iml

I am using nested cross-validation to get performance estimates in a classification task. I would like to compute feature importance using permutations with the iml ...
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26 views

interpreting RMSE when variables are transformed and compare it with no-transformed variables model

I want to compare different models for biomass estimation using different dasometric variables of trees. To achieve this I am using three models with the original variables and three models using ...
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23 views

Autocorrelation differences

Though I know the key definition of autocorrelation. How can I define the difference of autocorrelation in case of simple regression model and multiple regression model?
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Interpretation of (simultaneous) confidence band against fitted values in multiple regression

In a homework question, I am asked to interpret a figure of the confidence band and simultaneous confidence band of 95% confidence level plotted against predicted values. The confidence bands are ...
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Need Help in interpretation of results for random forest model

I was working on a binary classification problem where the ratio of Y(Unprofitable)/N(Profitable) is 52/148, in a train set with a sample size of 200. I got expected results with random forest model ...
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Why RANDOM noise images always predicted as BIRD?

Say I have fine-tuned a 10-classification ResNet18 network on CIFAR-10 and the accuracy on validation set is about 93%. However when feeding into 5000 random noise images (Gaussian noise with the ...
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Johansen-Procedure Interpretation (ca.jo)

I am trying to run a Johansen-Procedure in a set of macroeconomic variables (GDP, credit outstanding and industrial production). I am working with them in level. How should I interpret the following ...
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Interpretation of “show as index” in Excel Pivots

Researching Excel Pivot table functions, I've stumbled upon "show as index" calculation and found almost no information about it. My problem is the interpretation of values it produces, and eventually ...
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1answer
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Interaction is not significant in ANOVA, but significant in Regression, which is nonsense

Variables that I have: randomization (categorical): control / low / high sesdummy (categorical): low / high fairness (continuous) I wanted to see if there was an interaction effect between two ...
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1answer
144 views

Logistic regression - what do parallel slopes mean?

I have fit two logistic regression models in which the probability for a student to succeed a course is fit against how many hours he/she studied, where the students of group one used one type of ...
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Interpretation and Prediction in Longitudinal Models with an Interaction between a Time-Varying Predictor and Time Itself

I am trying to develop my intuition about how to interpret an interaction between a time-varying predictor and time itself. I have several years of routinely collected outcomes data from a drug and ...
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39 views

Problem in interpretation of result of Pearson chi-square?

We are conducting research to examine a relationship between some triggers and migraine with aura. the sample obtained by a questionnaire to and the sample classified into two categories (diagnosed ...
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33 views

How to interpret Linear regression model with dummy variable?

I am trying to run a linear regression with a dummy variable on NBA statistics with NBA Salaries as the $y$ variable, and different performance statistics as the $X$ variables. I have already ran a ...
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How to interpret Linear Regression Summary with Dummy Variable R

I am trying to run a linear regression with a Dummy Variable on NBA statistics with NBA Salaries as the y variable, and different performance statistics as the x variables. I have already ran a linear ...
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Interpreting a Dependent Variable that is Standard Deviation of Regression Residuals

I have a regression (OLS) output and was hoping to get some suggestions on how I might be able to interpret the coefficient using Stata or SAS. The dependent variable is ‘standard deviation of ...
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1answer
45 views

Interaction of Time-Varying Predictor and Time: How its inclusion changes the meaning of coefficients

I am interested in how an interaction between a time-varying-predictor and time changes the interpretation of other coefficients in a model. I am modeling the effect of amphetamine-type substance (...
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1answer
12 views

Interpretation of Clustering Results

We are trying to use a clustering technique to isolate and analyze bugs when the software is in use in the production system. Here, features of the data are whether a user used certain features/...
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1answer
27 views

glm with two interactive factors

I've run a glm (gaussian family) with a*b as independent variables. At first, I run two separate models (like glm(y~a) and ...
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T-test and ANOVA suggesting different results?

I'd like to start off by saying I am very much a beginner to statistical analyses, so I might be missing some key ideas here. Context: My study involves an experimental group and control group that ...
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Curious on using black box model interpreters (LIME, SHAP, etc) for production models

So, I'm wondering how many of you have been in a similar situation: We have a XGBoost classifier in production that is performing really well. As an enhancement, I want to add an explainer to provide ...
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Interpretation of fitted probabilites in binary logistic regression [duplicate]

I run a simple binary logit regression with a single dummy as IV. The output gives log odds and is: Intercept: 0.3045 Female: 0.4521 Calculating the odds ratio for female is $exp(0.4521) = 1....
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How to interpret Dunn's test in R (holm method)

0 1 I want to compare atmospheric pollutants concentrations between 3 geographical zones for a project. I used the non parametric test of Kruskal-Wallis, which returned a p-value<0,05, so I ...
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1answer
52 views

Filling missing data points with lmer prediction model

I'm trying to interpolate the missing data point using lmer model prediction. Subsetting to a table without any na to the missing column of interest: ...
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Interpretation R results linear Model with Interactions

I´m trying to analyse the effects testosterone in combination with a specific pill type can have on reactiontimes.For example, if there is a difference in the reactiontimes between people who have low ...
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33 views

ROC curve under diagonal?

I trained an SVM to classify images based on some extracted features (using the ISIC dataset). The resulting ROC curve produced by sklearn looks like this: I have don't quite understand the line for ...
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How to interpret a fixed effect model

I am doing a research for a school project and I have a hard time to interpret my results from a fixed effect model. So far, I found this:Interpretation of fixed effect model (panel data). Though, it ...
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1answer
47 views

Interpreting regression when y variable is a proportion

say I have a regression of the sort: fraction on men aged 18+ incarcerated = a + blog(income) +e, where the unit of observation is a county. would the correct interpretation be, an increase in 1 log ...
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How to manage a variable collected at various level in a machine learning model based on nested hierarchical data?

I'm trying to use machine learning to model the risk of healthcare-associated infections (HAI) for patients in a number of hospitals. I have variables both at the patient, ward and hospital level. ...
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How do I interpret the coefficients of a statsmodels multiple regression model with 2 dichotomous variables?

I have a continuous dependent variable Y and 2 dichotomous, crossed grouping factors forming 4 groups: A1, A2, B1, and B2. I am looking for the main effects of either factor, so I fit a linear model ...
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R and spark: how to interpret a multiple linear correlation

hi everyone I'm using new tools for me that are R and spark. I tried to make a multiple linear correlation between the dependent variable (called "trip_duration") ...
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Interpret “if any of - values” when one of any is missing

I am making a research and I have the following dilemma: My material contains some specific allergic diseases, e.g. asthma, birch and egg. I have one variable that checks if there is any allergic ...
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1answer
25 views

Interpretation of interaction term between 2 continuous variables

I'm running a multiple linear regression of revenue (rev) on identity (ID), an index which measures a customers identity towards ...
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1answer
38 views

How do I interpret my ACF & PACF plots?

I am not very good at Time Series, so I have a few questions about my ACF & PACF plots. I have read through similar questions on stack exchange and other websites, but their graphs look different. ...
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Testing for parallel trends in panel data/diff-in-diff with only 4 time periods

I am trying to test for common trends on Stata using coefplot, with 4 dummies for each time period (where they equal 1 at time t and if the individual is in the treatment group). However, clearly ...
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Interpreting a time series graph

Hi, I'm new to time series. Let's say t represents weeks and y represents temperature. Is it correct to interpret that on week 25 temperature was -1? If so does this mean that y25 = -1?