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5 views

Searching for a term for systematic, universal non-reporting in survey data

I am searching for a technical term to describe a situation I have run into my survey research and analyzing survey datasets. In experimental survey research, systematic under-reporting and ...
0
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1answer
13 views

How to proceed with lagged variables and correlation matrix?

Would it be correct to report a correlation matrix with the variables not lagged when you use lagged variables to fit the model? I think that you have to report the variables that you use in the ...
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0answers
24 views

reporting mixed effects linear regression: t statistic or model comparison?

We have a one factor three level repeated measure experiment with ratio data (reaction times). We fit a mixed effects linear model using lmer (in fact lmerTest) - maximal, with subjects and items as ...
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0answers
7 views

how to report effect sizes for average MAPE when comparing methods

My question is around how to report effect sizes ? I have 2 different methods and a naive method: I have method 1 applied to 1000 time series data and its average symmertric Mean Abs Percentage ...
3
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2answers
82 views

How to prevent the appearance of overfitting due to firing many models on a small data set?

I applied support vector machines to a relatively small dataset. I used relatively simple techniques, and achieved publishable results. Now, when already writing the paper, I got an idea, which would ...
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1answer
33 views

How to choose the observation with the median value when there are an even number of observations?

Obviously, in most circumstances, you would just take the mean of the two middle values. However, imagine a dataset of 100 countries. You want to know which country has the median household income. ...
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2answers
152 views

Why is it so uncommon to report confidence intervals for medians?

Why is it so uncommon to find confidence intervals reported in papers from applied sciences? I work mostly on Computer Science, but often read papers from (Social) Psychology, Sociology and Urban ...
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1answer
51 views

Reporting exponentiated coefficients in a logistic regression, t-value and confidence intervals

I recently encountered a situation regarding the reporting of two predictor effects in a logistic regression, which I plan to report their exponentiated coefficients in the text with their SEs, t- ...
1
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0answers
22 views

Significant digits for curve fit to numerically generated data

Say that I fit some data with some model, for instance a linear function $y = mx+b$. What is the proper way to report the fitted coefficients and the goodness of fit? Specifically, if I do the fit in ...
2
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2answers
31 views

How best to communicate uncertainty due to data quality and measurement issues

This question is coming from a business background. I want to focus here on issues that occur within a business (or perhaps academic) background which are usually difficult to quantify but it is ...
12
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4answers
370 views

Confidence intervals when the sample size is very large

My question could be rephrased as "how to assess a sampling error using big data", especially for a journal publication. Here is an example to illustrate a challenge. From a very large dataset ...
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0answers
30 views

What is going on here? Omnibus repeated measures ANOVA is marginal, but follow-up planned pairs <.05

I have a repeated measure ANOVA with a decent sample size (124 participants, with a score for each person for 3 conditions). The data are moderate to strongly positively skewed, (though similarly). ...
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0answers
171 views

How to report results from a linear mixed model “test of fixed effects” in SPSS?

What is the appropriate way to report results for linear mixed model based on the "test of fixed effects" table in SPSS? Is it just (F=xxx, p=xxx)? This isn't my data but this is an image I found of ...
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0answers
15 views

Accuracy of reported measurements

I take three measurements: 71, 72 and 74. Each of the three measurements have 2 significant digits. The mean of my three measurements is 72.33 (rounded to 4 significant digits). Because my ...
4
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1answer
133 views

How much of your p-value do you report in a publication? [duplicate]

I know this will vary from journal to journal, but I'm working on my first publication and have had little guidance, so any personal experiences would be helpful to me. When you present your p-values ...
4
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2answers
103 views

How to properly state the average of a discrete number in a report?

I'm wording a report on the averages of a discrete variable, and am trying to get the most appropriate sounding wording. Consider the able below: ...
3
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0answers
202 views

Report in ANCOVA: descriptive means or estimated marginal means?

I have conducted an analysis of covariance, ANCOVA, followed by Bonferroni post-hoc tests, on SPSS. I want to report the differences between my groups in text (APA style) and in a corresponding bar ...
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0answers
11 views

Is there a general structure for papers/documents explaining computer vision databases?

I recently created a database of images for testing a specific computer vision problem. Due to lack of data in the first place, I designed an algorithm which generates new images from the few existing ...
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1answer
233 views

Why would I want to bootstrap when computing an independent sample t-test? (how to justify, interpret, and report a bootstrapped t-test)

Let's say I have two conditions, and my sample size for the two conditions is extremely low. Let's say I only have 14 observations in the first condition and 11 in the other. I want to use the t-test ...
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1answer
81 views

How to report data when there is interaction

I did a multivariable logistic regression analysis to estimate the effect of an exposure (E) on an outcome while adjusting for confounders. I investigated interaction and discovered a significant ...
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2answers
1k views

Reporting degrees of freedom for Welch t-test

The Welch t-test for unequal variances (also known as Welch–Satterthwaite or Welch-Aspin) generally has a non-integer degrees of freedom. How should these degrees of freedom be quoted when reporting ...
2
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0answers
92 views

Normality violations in multiple regression - report bootstrapped CIs, p values & t values?

I have analysed some data for a research project using multiple linear regression. However, normality assumptions for this method were not met in my data (and could not be resolved using ...
3
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2answers
383 views

From SAS to R - what are “must” packages for reporting

One big advantage of SAS over R is arguably its ability to produce quite complex reports with few statements; think of PROC SUMMARY or ...
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0answers
9 views

What information should be in a paper on the analysis of maintenance of fleet system

I need to write a conference paper on recent analysis of two data sets. One data set contains measurements of vehicle operating characteristics for a fleet of vehicles. The 2nd data set contains the ...
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0answers
18 views

Decriptive statistics for a large amount of times series

I have 1,000 individual company time series of a variable, say X, observed 500 times (weekly observations). I would like to describe how this variable behaves. A graphic presentation of each time ...
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0answers
54 views

Troubles reporting transformed variables for log and sqrt into a general equation

Good morning everybody, I see CrossValidated has really high level of questions and answer; I am just a student so I hope this question is not too basic... Suggestion of further readings available ...
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0answers
138 views

How do I report the result of an mcp-Tukey-test, i.e. how do I report it's z value?

After doing a model comparison with my mixed lmer model, I have a model with two main effects, no interaction, say signal ~ factor A + factor B + (1|subj). Factor ...
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0answers
114 views

Reporting Fixed Effects as (partial) correlations?

I'm doing a linear mixed effects analysis in which I'm really only interested in one of the fixed effects. I have several other fixed effects and a random intercept term, but none of them are ...
3
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1answer
90 views

Should you report variance of asymmetrical data, such as ratios?

I have measured the time taken to solve a problem by algorithm $X$ and by algorithm $Y$. It takes a quite long time, so I have only 10 data for each algorithm: $$ X : ( x_1, x_2, \dots , x_{10}) \\ Y ...
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0answers
38 views

What advantages should a weekly latency report give me over a daily report

We have a daily report that takes the days p90 website latency data and compares it with the same day over the past four weeks and tells whether the p90 latency has gone up or down for a particular ...
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0answers
571 views

Writing up findings from path analysis

I have obtained my results from a path analysis (using MPlus) and I´m not sure how go about writing a results section in APA style. The model is showing a nice fit to the data, my hypotheses are ...
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0answers
65 views

What to do with interactions that improve the model fit but are not significant?

I'm using Poisson loglinear regression (from Generalized Linear models, SPSS) to analyze different patient variables that influence LNT-lymph node yield-(poisson distribution). After removing the main ...
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0answers
274 views

Reporting generalized linear model results

I am looking for help phrasing/reporting the results of a Generalized Linear Model. I have received some feedback that my current format is difficult to understand. I have multiple predictor variables ...
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0answers
166 views

Reporting two-way ANOVA

I've been trying to figure out how to properly report a two way ANOVA with two between-subject variables and their interaction. Most references I found suggest to report it in the following way: ...
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0answers
67 views

Significant digit 354 rule from Particle Data Group

The particle data group (PDG) has a particular rule to round the value of a measurement. You can find the complete description at this link (page 13). Summarizing: ... if the three highest order ...
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1answer
241 views

How to report results from eight paired t-tests in a scientific paper?

What would be the most efficient way to report test results from several paired t-tests in a scientific paper? If I gave a bar graph per test result (something like this) would it be too much? Should ...
6
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1answer
4k views

Reporting results of linear mixed-effects model

Linear mixed-effects models aren't commonly used in my corner of biology, and I need to report the statistical test I used in a paper I'm trying to write. I know that awareness of multilevel modeling ...
2
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2answers
375 views

Reporting regression statistics after logarithmic transformation

I'm a bit troubled about how to report linear regression statistics after log transformation of the dependent variable. I suppose I should report the transformed coefficient, but would they be easily ...
1
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1answer
569 views

Bootstrapped t test in SPSS: Why are some p value cells blank?

Using an independent samples t test, I am comparing the performance of 2 groups on an activity, based on the percentage of items correct (the percentage of total items correct, as well as percentage ...
2
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2answers
537 views

Is it worth reporting small fixed-effect $R^2$ (marginal $R^2$), large model $R^2$ (conditional $R^2$)?

In a mixed model analysis (lme4 + lmerTest for R), I want to analyse the effect of 3 predictors, say A, B and ...
2
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1answer
297 views

Reporting bootstrapped output for an independent samples t test

When reporting results of a bootstrapped independent samples t-test, can I just report the t statistic alongside the bootstrapped p value? Or do I also need to report confidence intervals?
4
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3answers
2k views

Variable is significant through stepwise regression but not in final model's summary; which should I report?

I used generalized linear mixed models (with the glmmADMB package) to identify environmental factors related to parasite abundance in rodents. I used stepwise ...
5
votes
1answer
15k views

How do you report a Mann–Whitney test?

I am doing my dissertation, and I am conducting a number of tests. After using a Kruskal–Wallis test, I usually report the result like this: There is a significant difference ...
0
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1answer
4k views

Standardised or unstandardised?

I've been trying to teach myself some statistics (all social science-related) using SPSS. It's all going well so far, I'm amazed at how much I'm managing to understand given how terrible I am at ...
5
votes
4answers
271 views

How to report the ratio of two sets of experimental results?

I have measured the time taken to solve a problem by algorithm $X$ and by algorithm $Y$. It takes a quite long time, so I have only 10 data for each algorithm: $$ X : ( x_1, x_2, \dots , x_{10}) \\ Y ...
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0answers
312 views

How to report significance of factor levels shown in summary of glm?

The summary of my GLM shows day 12 of factor Date to be significant, but anova(model, test="Chisq") shows Date to be not significant overall. I know how to report the statistics from the Chisq table, ...
2
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0answers
49 views

Which of these two ways is better to report comparison of paired data?

Suppose I am comparing the computational time of two algorithms A and B. They are solving randomized problem P. Let's say I solved the problem for seeds $ 1, 2, \dots, n $ with both A and B and got ...
1
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1answer
116 views

Graphic representation of data

I conducted exploratory analysis of my data and got Mean and standard deviation values from the original data and plotted the data using boxplots. I conducted regression models (GLM and GLMM) on the ...
1
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1answer
4k views

How to report result from two-way repeated measures ANOVA?

I have conducted an empirical study as part of my master thesis. I have developed a software tool where cards can be sorted (affinity diagram) and in the study each test subject did a number of ...
5
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0answers
77 views

Words that estimate numerical proportions of a group

There seem to be more than a few papers that surround the use of certain words to define the probability of an event without actually using the numerical probability itself. For example, if you are ...