Questions tagged [frequency]
The frequency measures the number of times an event occurs in a data set.
356
questions
4
votes
1
answer
49
views
How to accurately estimate the probability of a rare event in a large dataset?
I have a dataset of 30,155 names and out of curiosity I verified that the longest name has 68 characters, which is quite big considering the mean and SD were 24.78 and 5.64, respectively. Based on ...
- 141
2
votes
1
answer
23
views
Check if the charachter frequency of two "words" are significantly different
Although the problem as in the title might sound a little odd, I have a dataset where each entry includes two "words" that include 1000 and 1100 characters respectively. For each entry, I ...
- 23
0
votes
1
answer
28
views
How to easily convert frequency data into raw data (large dataset) for t-test? [closed]
Statistics goal: Determine if the difference between two datasets is statistically significant.
Dataset description: The data is available in the form of particle size (mm) v. particle count (...
- 11
0
votes
0
answers
15
views
How to compare frequencies of type of stress events with repeated measurements over time in a weekly diary study?
We hope you can help clarify whether a Chi-square test of equal frequencies (in SPSS) would be the correct choice.
Study participants have reported experienced stress events (text variable) in a ...
- 1
0
votes
0
answers
25
views
Can I use Chi^2 to test significance in frequencies of three groups?
I have conducted fieldwork on tree seedlings in plots with different treatments: natural, managed, and fertilised.
The dataset consists of the frequency at which the different tree species occur. I ...
- 528
8
votes
2
answers
232
views
Best plot in R for count data with a broad range and lots of low frequency data
I have a data set that looks like this, in reality there are about twenty categories with a count of 1:
...
- 195
2
votes
1
answer
102
views
Chi square test (or alternative) for mixed design categorical data
I have the following question:
I collected the number of different symptoms at two time points (Baseline BL, Follow-up FU) in two groups (Control Group CG, Intervention Group IG). So, there is a ...
- 169
4
votes
1
answer
164
views
Can I use logistic regression if one category of the dependent variable has a very low frequency?
An example of 100 subjects. Let's say I wish to study the impact of literacy levels (0 as limited and 1 as adequate), anxiety levels (0 as no anxiety and 1 as severe anxiety) and sex (0 for female and ...
- 367
0
votes
0
answers
30
views
Is it possible to test for causality using Bayes theorem and frequency tables?
I am used to test causality using Granger test with time series. But I don't know how to test for causality with categorical data. For instance, I want to test if a high level of hardskill causes a ...
- 23
0
votes
0
answers
22
views
How to test if a particular frequency is significant or not in a fourier frequency spectrum
I have got a timeseries data with which I plotted a frequency spectrum and I could eyeball all the significant peaks (significant frequencies) in the plot. But I want to do this for a spatial data (...
3
votes
2
answers
362
views
Goodness-of-fit test for very skewed data [closed]
I am working with two quite large datasets (9000 obs and 3800 obs). Each observation has been grouped into 1 of 12 categories and I am looking to test if the frequency of categories in the smaller ...
0
votes
0
answers
13
views
Is the spectrum of a signal circularly symmetric if the signal itself is circularly symmetric?
Let’s consider a signal that is circularly symmetric complex Gaussian process (proper):
$$ s \sim \mathcal{CGP}(0, C, 0) $$, and,
the covariance has the following form:
$$ \mathbf{C} = \mathbf{C}_{rr} ...
- 235
0
votes
0
answers
16
views
Stationarity and Chow-Lin disaggregation
My goal is to have higher frequency data (quarterly) for the GDP of my region (yearly data) through quarterly auxiliary data. Therefore my goal is to perform a Chow-Lin regression using the package <...
- 111
0
votes
0
answers
34
views
Is there any other method besides inflection point to find the origin of positive rates?
So I have this dataset that looks like this.
Income is the amount of income customers at a grocery stores reportedly make.
Campaign is whether the customer accepted the campaign, 1 if they did, 0 ...
Alan Morales
-1
votes
1
answer
56
views
Apply divergences between two "relative frequency distributions", instead of between two "probability distributions"
Introduction. Recalling that:
The frequency is the number of observations of a specific outcome.
The relative frequency is a proportion of all observations (frequency / total observations).
A "...
- 280