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11 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). ...
0
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0answers
63 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
14 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 ...
3
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1answer
84 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 ...
3
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2answers
89 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
129 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
8 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 ...
2
votes
1answer
90 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
46 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 ...
8
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2answers
541 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 ...
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0answers
45 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
277 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 ...
0
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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
45 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 ...
0
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0answers
77 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
77 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
87 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
24 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
327 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
52 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
208 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 ...
1
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0answers
119 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
60 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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0answers
15 views

Reporting change when the baseline varies

I am discussing how growth of a business changes over a time period with a colleague. The issue is, that I want to extrapolate the impact of business investment beyond maintenance. The example is a ...
0
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1answer
183 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 ...
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0answers
61 views

Comparing Overlapping Percentages

I observed how frequently participants exhibited five specific behaviors during testing. The total of the below percentages exceeds 100%, because some participants (30.43% of the sample) exhibited ...
5
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1answer
3k 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
277 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
404 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
392 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 ...
1
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1answer
234 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
11k 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
2k 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
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4answers
245 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 ...
1
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0answers
245 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
108 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
vote
1answer
3k 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
76 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 ...
2
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2answers
94 views

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. ...
2
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1answer
55 views

Are these possible LeveneTest results?

I have experimental data of response times that differ according to the factor TrialType: Regular or ...
1
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0answers
21 views

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 ...
1
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0answers
759 views

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 ...
1
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1answer
99 views

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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0answers
3k views

How to report results from Friedman's test including post-hoc results

I have performed comparison of repeated measures for a group using Friedman’s test (K-related-samples test) and additional post-hoc analysis with Wilcoxon signed-rank test and Bonferroni correction. I ...
2
votes
3answers
1k views

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 participants’ scores on the Specific-Self Efficacy Scale on ...
9
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3answers
3k views

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. ...
16
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4answers
479 views

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 ;) ?