All Questions
17
questions
0
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0
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39
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Non parametric tests for 2 way anova and linear model? [duplicate]
My dissertation is due very soon and I have only just realised a large mistake in my work. I misread the normality test I used, which actually showed non normal data- but I still have homogeneity of ...
- 1
1
vote
1
answer
60
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alternative to ANOVA or simplifying approximations for multi-factor,, batch design with binomial data (advanced beginner)
this is my first post. I did already read various didactic materials and related posts here, but still had trouble figuring this one out. Sorry this is so long but I am trying to be as specific as ...
- 23
3
votes
3
answers
5k
views
What statistics test to use to compare multiple groups with different sample sizes
I'm running a test where I need to compare four groups on different dependent variables. Two of them are categorical and I'll a use Chi-squared test for the head-count while one y is a continuous ...
- 33
0
votes
1
answer
36
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How to deal with non-normal data? Tests
I have a database of a breaking news (tweets, timed events) and i need to find if there are significant differences in the coverage of the events by different media outlets (MOs) with different ...
0
votes
1
answer
360
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Do I need to check for normality in a one-way test (in R)?
http://www.sthda.com/english/wiki/one-way-anova-test-in-r
Here it says when the LeveneTest has small p-value we can use the alternative one
...
J.Doe
1
vote
1
answer
81
views
Is it appropriate to infer from spearman correlation with 3-level ordinal variable?
Suppose I have the data of 300 patients containing their age and grade of tumor at the diagnosis. The grading has only 3 levels: Grade 1, ...
- 165
2
votes
2
answers
109
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Low number of observation while comparing means
I would like to test the difference between the mean weights of 4 groups So, my dependent variable is continuos, but there are 3, 12, 26 and 56 observations in my groups. Should I use One-way ANOVA or ...
- 951
1
vote
3
answers
2k
views
Using t-test/ANOVA on bounded data
Can a t-test/ANOVA approach to hypothesis testing be carried out when data has well-defined upper and lower limits and is not continuous?
Let's assume a situation where data are generated by some ...
- 11
6
votes
1
answer
790
views
2
votes
1
answer
359
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ANOVA for heteroscedastic data
I have applied ANOVA on 3 independent groups of unequal sample sizes. I doubt that the ANOVA result are showing Type 1 error because of heteroscedasticity in data points (checked using F-test as well ...
- 31
1
vote
1
answer
643
views
Non-parametric test for 3 matched-pairs?
I showed a video to 3 groups, and they answered questions before and after the test.
Control group watched it with no ads
Group A watched it with ad A
Group B watched it with ad B
The sample is such ...
- 113
8
votes
2
answers
62k
views
Non-parametric alternative for 2-way ANOVA [duplicate]
Suppose I have 2 independent variables whereby normal distribution can be assumed.
However, there is unequal variance and interaction between the two factors is unknown.
Could someone suggest an ...
- 101
2
votes
0
answers
435
views
What is the nonparametric variant of multivariate ANOVA with more than one one factor (and with interactions between factors)? [duplicate]
I analyze real data where assuptions of classical multiway (more than one factor assumed) MANOVA (more than one response variable) are not met (normality, equal variances). Is there any nonparametric ...
- 3,989
2
votes
1
answer
300
views
Can median polish be used for hypothesis testing?
I recently learned about the median polish method as a robust alternative to ANOVA for the purposes of fitting models to data. But, is there a way to test hypotheses using median polish, such as a ...
- 2,354
6
votes
1
answer
9k
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Friedman's test and post-hoc analysis
I am carrying out a statistical analysis for my research. I am using a Friedman's test with post hoc analysis. At present I am using the function ...
- 61