All Questions
Tagged with nonparametric statistical-significance
110
questions
2
votes
1
answer
450
views
Which statistical test works for paired and grouped data?
I have a small set of samples of plants where I've made some changes to some but not others and want to know if there was any significant effect on the number of leaves as a result of this change. My ...
- 147
3
votes
0
answers
446
views
Multiple comparisons between two groups (non-parametric)
Update Added more details about the Experimental setup.
My experiment comprised two groups, control (N=25) and experimental (N=26). Each participant belonged to one group. Their performance has been ...
- 123
1
vote
0
answers
20
views
Statistical Comparison of Algorithms by User Ratings
I have an experimental setting where I compare 3 algorithms on the same dataset(n_sources), through user subjective evaluation of the produced outcomes(each algorithm does a different kind of sound ...
- 165
2
votes
1
answer
384
views
Which statistical test to use for multi-modal and mixed type data?
I researched for hours but cannot find the direction for the right statistical test to use. Here is the situation for Population A and B:
When plotting this frequency distribution, it looks like this:...
- 207
0
votes
1
answer
553
views
Significance test with non-normal, bounded data?
I am attempting to do a one-sample significance test to determine whether a set of data differs from a given value (0 in this case). The issues I have with these data:
Non-normally distributed data, ...
- 3
2
votes
1
answer
727
views
Appropriateness of nonparametric bootstrap methods to assess difference between two groups [closed]
This question is motivated by the discussion of this earlier question.
I have two samples $X$ and $Y$, where both samples have $n$ elements. Both samples represent optimal solutions returned from two ...
1
vote
2
answers
404
views
Appropriate statistical test for data which do not have normally distribution and do not have equal variance
My data has 150 samples and is not normally distributed, and it does not have equal variances either. I know t-test (e.g. this python method) can be used when data is normally distributed and it can ...
- 271
3
votes
0
answers
56
views
Statistical test for first sample greater than given sample?
Does anyone know of a name for the following statistical test/whether there is a name/whether the following line of reasoning is just bogus?
Say I have a value $x$, and a way to generate samples from ...
- 31
0
votes
1
answer
292
views
How to compare right skewed data with non-parametric test?! Which test is the right one
I am trying to compare cell sizes from multiple locations. I have 5 biopsy locations from 25 individuals = 125 single tissue biopsies.
The cell size is acquired using digital image processing and one ...
- 1
32
votes
3
answers
5k
views
Why does the Kolmogorov-Smirnov test work?
In reading about the 2-sample KS test, I understand exactly what it is doing but I don't understand why it works.
In other words, I can follow all the steps to compute the empirical distribution ...
- 915
1
vote
0
answers
32
views
Test for occurrences of pairs from samples with different distributions?
I have two collections of data, A and B, each containing a large number of 10-digit binary strings. For instance, an element of A could be a=1011001111, and an element of B could be b=1001010000. I ...
- 482
1
vote
0
answers
95
views
What among location, scale and shape is Kolmogorov��Smirnov test statistic sensitive to and why? [closed]
I understand that the Kolmogorov–Smirnov test statistic for a given cumulative distribution function $F(x)$ is $D_n = \sup_x |F_n(x) - F(x)|$. However, if I have to rank its sensitivity to location, ...
- 5,643
1
vote
1
answer
17
views
non parametric test to detect price discrimination
Let us say that I have these columns for a product:
Day
Price
Channel of sale (e.g. web or snail mail)
Number of sales
Looking at the distribution, they can be bi modal as products can be on sale/...
- 2,245
0
votes
1
answer
84
views
No normal, paired unmatched data, unequal size of samples
I want to know if there are differences in firing rate of one neuron between two types of trials: left and right. The data are non-normal, paired and unmatched and the size of samples is different.
...
0
votes
2
answers
2k
views
Goodness of fit (chi-squared) for non-exclusive categories
I'm analyzing some data, which is sorted into some categories, and would like to compare my results to a hypothetical distribution of those categories. I feel like the chi-squared test for goodness of ...
- 1