7月22号是什么日子
百度 《中国经济周刊》2018年第11期封面
ANOVA stands for ANalysis Of VAriance, a statistical model and set of procedures for comparing multiple group means. The independent variables in an ANOVA model are categorical, but an ANOVA table can be used to test continuous variables as well.
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Do you need to analyse the interaction even when anova shows its not significant?
I made a lmer model that, besides other things, includes an interaction between two variables. Anova showed that that interaction is not significant (but both main effects are). The interaction is ...
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Polymer Science DOE Design Model Fit Factors and Response Question
Situation: We conducted a Taguchi DOE to test how (factors) temperature, printing speed, and cooling speed affect the (responses)mechanical properties and the inherent thermal transitions(eg, glass ...
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Is anova() on an lmer model a valid test before pairwise comparisons in a dataset with incomplete information from all participants?
I am at the beginning of my statistics journey and am trying to understand if my reasoning makes sense and what key considerations I am missing.
The study design
In a fictive scenario where a RCT was ...
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Seeking Advice: Analysis Strategy for a 2x2 Factorial Vignette Study (Ordinal DVs, Violated Parametric Assumptions)
I am seeking guidance on the most appropriate statistical methodology for analyzing data from my research investigating public stigma towards comorbid health conditions (epilepsy and depression). I ...
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Which type of anova should I use for unbalanced data (different number of replicates for treatments)?
I have three treatments: T1, T2, and T3. T1 and T2 each have 3 replicates, while T3 has only 2 replicates. I did continuous measurements (V1) over a month, so I am looking for the effect of ...
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AIC prefers full model, interaction not significant — which to use for emmeans
I am using R.
I have the following data set:
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Mixed effect model or linear model- isSingular problem
so I have 10 levels for genótipo (plant genotype) and 5 levels for Local (sample locals, they are located far apart geographically). I'm interested, in the current model, in the overall effect of ...
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Analyzing Differences in Dependent Categorical Variable Given Two Different Subject Types
I am trying to analyze some survey data in R but I am a bit confused about how to run the right type of analysis. In the survey of college students, the participants were put in a hypothetical ...
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Normality of residuals in aov() can be assumed, but test for homoscedacity fail, do I have to recheck normality for each group applying oneway.test()? [duplicate]
Assume the following situation: Assume you ran a Fisher Oneway-ANOVA (aov() in R) and found that the residuals are normally distributed based on the Shapiro-Wilk ...
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Growing grapes, analyzing growth
I planted 18 grape plants in three rows of six. The rows are arranged on a south-facing slope. I have been told the soil conditions are different at the top of the hill versus the bottom and that the ...
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What statistical model is appropriate for a mixed design with ordinal, continuous, and discrete outcomes?
My study is on understanding differences in gender relative to cognitive load and AI usage while coding. My background is not in statistics so I am trying to do the study justice.
2 genders are being ...
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Should I use one-way ANOVA or pairwise confidence intervals for this data?
I’m running a study with 4 conditions, each representing a different visual design of a network visualization. I want to compare how effective each design is across different task types. Effective ...
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Should I use ANOVA, MANOVA or Kruskal-Wallis (Or something else?!) trying to show that there is a significant difference between four vignettes? [closed]
I’m quite new to stats and very new to stackexchange so please bare with me.
I have a set of data which I want to analyse to basically see if having piercings makes it more or less likely for someone ...
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Best approach to compare different measurement techniques
I am comparing two techniques to measure distances (in mm) on CT scan data. Broadly speaking there is a manual method (current gold standard) and an automatic method. I have 45 samples in total. I am ...
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Is mixed ANOVA suitable for this set of data?
I am working on an experiment where i evaluate the effects of a pesticide on a strain of cyanobacteria. So i applied 6 different treataments (3 treataments with different concentrations of pesticide ...
