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

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1answer
25 views

Can I still interpret a Q-Q plot that uses discrete/rounded data?

I have a data set with only discrete/rounded values in it. As a result, when I produce a Q-Q plot a "stair-case" pattern appears. Can I still interpret this just like a normal Q-Q plot even though it ...
0
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0answers
18 views

GEE in SPSS: the case of ever-decreasing QICc values

I've been using GEEs in SPSS 22 to analyze my dissertation data and have discovered an interesting problem: when trying to figure out which subset of model factors have the lowest QICc, and therefore ...
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0answers
23 views

Interpreting results from a mixed model with interactions

I need your help interpreting my model's results. To make story short, I have a continuous dependent variable $Y$, and two factors $A$ and $B$, each with $2$ levels $(A_1, A_2, B_1, B_2)$. My main ...
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2answers
19 views

Help in regression interpretation, including interaction terms

I m doing a quantitative analysis for my dissertation and I m having issues with the interpretation of my results (I have little knowledge of SPSS). I m doing a panel data analysis with multiple ...
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0answers
18 views

Am I using Goodman-Kruskal gamma or Somers D or Kendall tau correctly and what do they mean?

I am seemingly blindly following this publication that has done work very similar to what I need to accomplish (page 18-21). My analysis is a multinomial logistic regression where I have 3 possible ...
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1answer
34 views

Interpretation of multinomial logistic regression output from R

I have used mlogit package and I am trying to summarize the results I have from my model. I have a question regarding the reference value and will get to that in a ...
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0answers
15 views

Need help on how to interpret Gamma Probability density function of gamma(2, 1/10) [duplicate]

The below sample graph was created using R, for an example I came across while reading (on Distribution of time until customer x arrives): ...
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1answer
70 views

How can a regression be significant yet both predictors be non-significant? [duplicate]

I know this question has been asked in a slightly different form here. But my question differs and because of the forum rules I can't post on that thread. I have 2 independent variables, n=32, highly ...
1
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1answer
29 views

ordered logit-difference-in-difference

I ran an ordered logit difference-in-difference estimation and got stuck in terms of interpretation. The dependent variable takes on values 1 2 and 3 and I am trying to obtain coefficients for the ...
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3answers
66 views

Analysis of Kullback-Leibler divergence

Let us consider the following two probability distributions ...
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0answers
23 views

Beyond multiple linear regression for longitudinal data?

I have a relatively large dataset from a longitudinal study (~100k subjects and ~10 random effects) where the outcome is a real-valued parameter. A simple run of R's ...
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0answers
15 views

How could I generate an “explanation” for each prediction in a classification ?

I have a classification problem. My classes are 0 and 1. The dataset is a bit big, the training is done on 7 million lines and 100 + variables so I choose to use scikit learn and the logistic ...
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0answers
18 views

Interpretation of categorical 2x2 ANOVA/Regression outcomes

I have found contradicting interpretation guidlines and wanted to clarify (using SPSS): I have a 2x2 design, so 2 categorical factors with 2 levels each and want to test for group differences on my ...
23
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3answers
637 views

Interpreting QQplot - Is there any rule of thumb to decide for non-normality?

I have read enough threads on QQplots here to understand that a QQplot can be more informative than other normality tests. However, I am inexperienced with interpreting QQplots. I googled a lot; I ...
0
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0answers
14 views

Comparison of trend lines [duplicate]

I have two data sets with about 7 points on each. Excel gives me trendlines with the following values: $y=0.0263x + 17.292\,,\quad R^2 = 0.09617$ $y= 0.0121x + 18.873\,,\quad R^2 = 0.01528$ ...
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0answers
52 views

Is this a case for an ordinal logistic regression? Problems interpreting output

I'm a beginner in statistics and R, sorry if this question may seem trivial. I've collected data measuring several different parameters in 40 subjects at two time-points (t1 and t2). There are 3 main ...
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0answers
30 views

Multinomial logistic regression interpretation in R

I have run a multinomial logistic regression test for the interaction between species of deer, days a camera trap was in the field and type of reaction. The model with the best AIC value was: ...
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0answers
37 views

R multinomial logistic regression interpretation

I have run a multinomial logistic regression test for the interaction between species of deer, days a camera trap was in the field and type of reaction. The model ...
0
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0answers
23 views

Complete interpretation of Cox regression output in R

I need help with complete interpretation of this output(below). Can someone explain all (almost all) estimators in this output: what they mean and what is the substantive interpretation. In ...
0
votes
1answer
51 views

Ordinal logistic regression with likert scales

I'm currently have a bit of difficulty determining how to analyze this data via logistic regression analysis. ...
0
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1answer
29 views

Understanding Regression vs. Means/Median Results

I am having a little difficulty understanding my results - could someone help me understand how to interpret, and if my process is sensible? Here is an example of what I am doing I am trying to ...
0
votes
1answer
14 views

Interpretation of two indexes Interaction Term

Respected Fellows. I will thankful if someone help me to explain my model results.my model is as follows. Yit=αPFit+βPSit+δ (PF*PS) it+εit Where Y is GDP per capita PF=Political Freedom Index ranges ...
0
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1answer
38 views

Interpreting CCF correlation in R

I am using ccf to find a correlation between 2 time series. I am getting a plot that looks like that: Note that I am mainly interested in correlation for the ...
2
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0answers
33 views

ACF and PACF plot analysis

I am new to ARIMA, and I am trying to understand these lag plots. Are the following ACF and PACF suggesting that the lag of my time series is 4? If I am wrong, please help me understand these plots. ...
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0answers
31 views

Simplifying numerous dummy variables

I'm looking into a regression analysis to compare the time it takes to award public contracts across different countries but holding some other variables constant is proving challenging. The set of ...
5
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3answers
122 views

How to interpret coefficients of $x$ and $x^2$ in same regression

If I have the below functional form for an OLS regression, how do I interpret the $x$ and $x^2$? I cannot interpret them separately, correct? Do I interpret them as a summation of the two ...
0
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1answer
37 views

Interpretation C value in linear SVM

My C value is very low (close to 0). Does this mean that my feature (dimensions) have no real separative (and thus predictive) value? (As the SVM basically chooses to ignore the training data ...
0
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1answer
7 views

How to interpret factor coefficients regarding unobserved values?

I am presented with a linear regression result that yields the following coefficients: ...
2
votes
1answer
17 views

Predictor subset of another predictor in linear regression model

I have a linear regression model such as $Income_i = \alpha + \beta_1 Primary_i + \beta_2 Secondary_i + \beta_3 Tertiary_i + u_i$ where my predictors $Primary, Secondary, Tertiary$ are dummy variables ...
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0answers
30 views

Interpretation of Linear SVM Coefficients [duplicate]

I’m building a model using Linear SVM from the Scikit-learn package in Python. I have found that Linear SVM performs much better on my training set than Logistic Regression. My question is, is there ...
0
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0answers
39 views

How to convert Spearman's $\rho$, and Cramér's V to Cohen's $d$?

Is there a way to convert both, Spearman's $\rho$, and Cramér's V into the same effect size (f.e. Cohen's $d$), in order to have an information about which of the underlying relationships ...
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0answers
12 views

Interpret an Expected Value of Sample Information graph

I am working on a model and I have calculated the EVPI, EVPPI and the EVSI. I need to interpret the graph of the Expected Value of Sample Information (EVSI), what should I say? The graph consists of ...
2
votes
1answer
57 views

Interpret Pearsons correlation output from R

I have conducted Pearson's correlation in R and need help interpreting the results. ...
12
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2answers
373 views

Subjectivity in Frequentist Statistics

I often hear the claim that Bayesian statistics can be highly subjective. The main argument being that inference depends on the choice of a prior (even though one could use the principle of ...
3
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0answers
70 views

How to interpret Pearson's $r$, Spearman's $\rho$, Cramér's $\phi_{c}$ and Cramér's $V$ correctly?

Is it right that both Cramér's $\phi_{c}$ (and consequently Cramér's $V$ as well) are similar to the Pearson correlation coefficient, $r$, (and so, to Spearman's $\rho$) in its interpretation, as it ...
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0answers
51 views

Please help with basic interpretation of an insignificant interaction. (With significant main and conditional effects)

I have a very basic understanding of statistics, and have done many correlations and regressions or simple t-tests, but never an interaction and it is confusing me a bit. I only need to understand the ...
4
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6answers
135 views

How to explain borderline p-values to non-stats people

I ran an OLS regression, and the p-value of one variable is 0.065, which is more than the threshold to consider statistically significant. However, it's not too bad either, as my data has only 300+ ...
0
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0answers
34 views

GLM with multiple categorical variables in R : how to interpret the result?

I have a binomial variable that I regress against different categorical variables which I have contrasted to build a reference of an individual Female, Married, aged 35-45, High education : ...
0
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1answer
22 views

Reparametrisation of a model when an interaction is significant to facilitate the interpretation

It is admitted that it is complex to interpret main effects when they are involved in an interaction. Lets take a regular linear model, with two categorical 2 level variables A and B who are ...
0
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0answers
9 views

different 'dimensions' of variation

Suppose I am interested in income elasticity of households for a particular good. I essence, it is a function of income. Now, I have two ways of how I can get the data (different types of data): 1) ...
2
votes
1answer
97 views

Analysing regression results

This question is a bit embarrassing, but I do not have much experience of statistical analysis. The problem I have is that the analysis I do of the results in my paper is so meager. My results from a ...
1
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1answer
35 views

How to interpret constant with different dummy interaction terms?

I would like to analyse the impact of Fund Size on Mutual Fund Performance by using quintiles (based on fund size). My approach is to look at the effect within each quintile to conclude uniformity of ...
0
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0answers
35 views

Interpretation and understanding results from a chi square test for independence

I'm making a chi square test on data that has information about students. I want to find out whether there is a relationship between how well the students did on a particular test and the level of ...
1
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1answer
49 views

Estimates from a log-linear regression model

I am estimating a economic growth regressions using dynamic panel data. My specification is as folllows: $$\ln Y_{i,t} = a \ln Y_{i,t-1} + bX_{i,t} + e_{i,t}$$ $Y$ measures income per capita $X$ is ...
0
votes
1answer
67 views

Interaction in logistic models with R. Using * operator or create an interaction variable?

I want to test the presence of an interaction term in a logistic regression with glm(). The formula is: ...
0
votes
1answer
38 views

Interpretation of categorical variable level interaction in a linear model/ ANOVA

This is similar to an earlier question which was never answered... Interpretation of interactions between categorical data... and which is much shorter so no problem if you would like to read/answer ...
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0answers
41 views

How to perform statistical test for enrichment of gene lists?

In a typical ChIP-Seq experiment, we found a transcription factor ABC peaks on 590 genes. 242 genes out of the 590 genes are classified as ...
1
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0answers
28 views

Analysis of mcmc output

I have a sequence of Bayesian Networks for del with more epochs. For example if i work with trafic on street I can have a BN for morning, one for afternoon e one for evening. If i collect data for ...
0
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0answers
89 views

How to interpret log fold change with negative values

I am trying to use the limma package to test some data. The data can have negative values as well as positive values and I'm trying to compare between condition 1 and condition 2. Example: ...
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0answers
97 views

Interpreting Augmented Dickey-Fuller in R

I know that this has been discussed before, but those discussions did not really answer my questions. I know how the ADF test works, but I am having trouble interpreting the output for the three ...