Linked Questions
18 questions linked to/from What are good data visualization techniques to compare distributions?
10
votes
3
answers
1k
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First quick glance at a dataset
Please pardon my ignorance, but...
I keep finding myself in a situation, where I'm faced with a bunch of new data I managed to find. This data usually looks something like this:
...
- 203
4
votes
2
answers
11k
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Is my data gamma distributed?
I have some data which looks like this when I plot a normalized histogram.
The full data set is available here and here (the second link is pastebin). It is 20,000 lines long.
My guess is that it ...
- 2,077
11
votes
3
answers
4k
views
Mean$\pm$SD or Median$\pm$MAD to summarise a highly skewed variable?
I'm working on highly skewed data, so I'm using the median instead of the mean to summarise the central tendency. I'd like to have a measure of dispersion
While I often see people reporting mean $\pm$...
- 295
5
votes
4
answers
770
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Ranking distributional data by similarity
The question in short: What methods can be used to quantify distributional relationships between data when the distribution is unknown?
Now the longer story: I have a list of distributions and would ...
- 523
4
votes
2
answers
6k
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Does this Q-Q plot indicates leptokurtic or platykurtic distribution?
The points have shown a "hump" pattern but I can't really identify that is it a narrow hump or wide hump?
- 67
3
votes
3
answers
5k
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Compare two distributions of large sizes and unequal variances where one distribution is heavily skewed
My data is from cells that are treated under two different conditions and then their response to the condition is measured by one output variable.
The cell populations in the two conditions are quite ...
- 151
2
votes
2
answers
12k
views
Visualizing multiple size distributions in one plot
I have 17 size distributions for different coral species, and I would like to be able to compare these distributions in one plot. However, the distributions are very different, so when I naively tried ...
- 21
2
votes
2
answers
1k
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Nonparametric test statistics for non-equal sample sizes
If I have two samples, with one 30-times larger than the other, which nonparametric test statistics should be considered for checking the null of equal distribution?
I am using Kolmogorov-Smirnov ...
- 129
4
votes
1
answer
2k
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Wasserstein distance and Kolmogorov-Smirnov statistic as measures of effect size
So I've been dealing with 2 sample hypothesis testing with very large samples (around 20,000s each). Whenever I test for the equality of distribution I always reject the null hypothesis, even though ...
- 63
3
votes
1
answer
1k
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What does a ratio of PDFs mean?
In searching for an answer I came across this about the pdf/cdf ratio but I would like to know if there is any meaning, name or supporting theory relating to the ratio of two pdf values, the numerator ...
- 627
4
votes
1
answer
602
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How to compare two datasets in terms of density?
I have two 1-D datasets (A: 300,000 points and B: 30,000 points) representing genetic events along the human genome (size: 3 billions "points"). I know that A and B are not uniformly ...
- 564
1
vote
2
answers
164
views
Transformation of a skewed sample for estimating better the mean
Given a skewed sample whose distribution is not normal and was caused by various reasons.
As a result the mean calculation is affected by the skewed distribution.
Can the following steps assess the ...
- 11
2
votes
1
answer
370
views
How to qualitatively describe distribution shapes
I have a distribution which looks a bit binomial, though with a cutoff, i.e.:
$P(x) = 0$ if $x \le 0$, rises to a bell-shaped peak at around $x=0.2%$, appears to tail off exponentially until an ...
- 1,485
4
votes
2
answers
216
views
How to deal with ratios when the denominator varies greatly?
I have a dataset with the number of businesses, e.g. bakeries or doctors, in some towns and cities.
I want to calculate the relative distribution of certain professions, but as the population size ...
- 91
0
votes
1
answer
142
views
Compare nonparametric distributions
I generated distributions of travel times of commuters using transportation simulation tools (for different scenarios). The distributions are attached below. I wish to statistically compare each pair ...
- 141
0
votes
0
answers
277
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Whitney Mann U test vs Kolmogorov Smirnov for a highly skewed continuous variable
I would like to compare task time to completion distributions (measured in minutes) across two groups. The distributions are highly skewed (the means are 300 to 400 times larger than the medians) and ...
- 143
3
votes
0
answers
62
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Formal testing for differences in kurtosis between two samples when bootstrapping suggests a difference
My question is similar to Testing difference in kurtosis between two samples where a comment suggested
Unless you are looking for an enormous difference in kurtosis, it's
unlikely any physically ...
- 330
2
votes
0
answers
35
views
Compare the quality of distribution fits
I have two random variables $A$ and $B$ they are of different size. Both are well fitted as $\gamma$ distributions. My question is to find which one is more gamma like.
Could You help me to solve ...
- 718