# Tagged Questions

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154 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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### 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, ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### How to report the results of Fisher's exact test for larger than 2 by 2 tables

What is an acceptable phrase for reporting a Fisher's exact test where the number of rows and the number of columns are both $>2$. An example in R: ...
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### Should the risk of Type II error associated with a n.s. factor be discussed if this factor significantly interacts with another factor?

When computing a 2(A)$\times$2(B)$\times$3(C) ANOVA, I observe that only factor A has a significant main effect. Factors B and C were not significant, yet display a moderate effect size and low power. ...
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### Are these possible LeveneTest results?

I have experimental data of response times that differ according to the factor TrialType: Regular or ...
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### Reporting percentages in preference type survey questions

I came a cross some survey results that show user preferences, asked in the form of the most and least preferred choices. The result reported was something like "x % of people chose option A as their ...
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### Reporting interaction effect for a 2x3 ANOVA

I have used a 2x3 mixed between-within subjects ANOVA to assess the impact of three feedback conditions (Grade, Comment and No Feedback) on participantsâ€™ scores on the Specific-Self Efficacy Scale on ...
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### Reporting predicted outcome of mixed effects models

I am analyzing some group-randomized longitudinal trial data with three time points using mixed effects model. Some people missed 1-2 time points, and I didn't exclude any cases with missing dependent ...
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### How to choose grid for SMM and report results?

In estimating a model with two variables by simulated method of moments. How does one generally choose the number of points on the grids? For example, consider one variable as interest rate between 0% ...
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### Research paper - section dependent variable for logistic regression

In my paper, in the section methodology, I have a subsection called dependent variable. But since I am performing a logistic regression, there seem to be 2 (or even 3) things that could be named the ...
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### How to report results from Friedman's test including post-hoc results

I have performed comparison of repeated measures for a group using Friedmanâ€™s test (K-related-samples test) and additional post-hoc analysis with Wilcoxon signed-rank test and Bonferroni correction. I ...
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### Why don't we use significant digits?

Any idea why we don't use significant digits in statistics? Something along the line of we are using estimates so rules about precision don't apply ;) ?
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### Number of significant digits to report

Is there a more scientific way of determining the number of significant digits to report for a mean or a confidence interval in a situation which is fairly standard - e.g. first year class at college. ...
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### Are there any ways to glean useful analysis information from a comments field?

I have a dataset of data and two of the fields are user comments - (I did not design this form) I would like to know if there is anything I can do to get any information from a comments field - are ...
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### Do I discuss the lack of interaction if I already discussed lack of main effects?

I conducted an experiment with 2 independent group variables (gender and language - language indicates either native speakers or 2nd language speakers) and ran a 2 way ANOVA. There were no main ...
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### How to do ANOVA write-up when there is no significant effect at all?

I was conducting a 'recall of negative words' memory experiment with a two-way between-group ANOVA and got no significant main effects and no significant interaction! How can I go about explaining ...
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### Book recommendations for biostatisticians in CRO and pharmacy

I would like to learn more about the work and statistical methods performed as biostatistician in pharmaceutical companies and clinical research organizations. It seems the book "Essential Medical ...
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### Cox-regression model: question about acceptability, meaning, & reporting

Apologize for insufficient info in my previous version of this question. So, I am comparing patient survival in a retrospective study between two different groups, using SPSS. Now the difference came ...
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### Sharing of a trained SVM model

I have been asked by a journal reviewer to provide the my final trained SVM models so that others can try to replicate or make use of the models. Is there an accepted way to do this? I was thinking ...
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### Is it necessary to report the bivariate correlations when reporting logistic regression?

I am writing up a logistic regression that looks at parenting factors (ie., parental depression, anxiety and stress) as predictors of the presence of a child anxiety disorder diagnosis. What is the ...
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### When can I leave counterbalancing factors (between participants) in an ANOVA out of a write up?

The following is a problem that I keep encountering in different forms. For now, I give one example, but I would also be interested in the answers to the more general question. I have a design with a ...
1k views

### Do we need to report the median or the Mean when using a Kruskal-Wallis test?

I have two groups. There is a significant difference according to the KW test. But do I need to report the mean or median of the groups?
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### Model selection in a paper: what to say about the dropped variables?

I have a question (simpler than my previous post today I hope!), which is probably very stupid as nobody has never asked it before. Lets say I am trying to explain the effect of 3 variables (A, B ...
273 views

### Alternative name for “incidence rate ratio”

I'm using a negative binomial GLM to predict individual level scores on a psychometric test that ranges from 0-27 and presenting the coefficient "incidence rate ratios". It seems a little strange to ...
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### Estimating the reliability of a test section

Consider me a "naive researcher." We have a test of 25 items grouped into 5 item types. Each item is correct or incorrect. All items are math questions, but we expected 4 item types to have ...
3k views

### How to report two-way anova results?

After finding a significant treatment in two-way anova, how do I report where the differences are? Every text I have read has left me at: Ah, the results are significant, so let's move on. In one-way ...
3k views

### Reporting main effects and interaction from ANOVA

When reporting a two way 2 x 3 mixed ANOVA I have recently heard that the interaction effect should only be reported if the two main effects are significant (APA style). Is this correct?
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### Reporting non-causal relationships

What is the appropriate way of reporting significant regression coefficients of a multiple regression when all variables have been obtained at the same measurement occasion? Specifically, do I imply a ...
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### Reporting results of simple linear regression: what information to include?

I have just performed some (very) simple linear regression in Genstat and would like to include a succinct and meaningful summary of the output in my report. I'm not sure exactly what or how much of ...