The frequency tag has no wiki summary.
2
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1answer
19 views
How to get a Standard Error for a Poisson Variable with Exposure?
I'm looking over some work performed by a consultancy and I'm unsure whether the standard error formula they have used is correct, and the subsequent conclusions they have drawn are erroneous.
They ...
0
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0answers
8 views
Generating yearly frequency plot from multi-year data [migrated]
I have hourly wind speed data in the following format
...
5
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1answer
135 views
Chi-squared distribution for dice not returning expected values?
I'm trying to verify that my dice are reasonably fair and balanced. I'm not sure I'm doing it right, though, since I'm basically teaching myself stats without references. To achieve this, I've settled ...
1
vote
0answers
28 views
Showing two groups have the same frequency distribution
I have two groups of the frequency at which 4 events happened and I am testing if they are from the same population. I used a chi squared goodness of fit test with expected value related to their ...
0
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0answers
20 views
Frequency of Math Symbols [migrated]
Does anyone know of a study that has calculated the frequency of math symbols based on some popular mathematics journals or math corpus?
For example in English you have letter frequencies of the most ...
0
votes
1answer
34 views
frequencies in 6 groups
This is my first time to be here and ask a question.
I have 60 patients with squint classified according to
age group into 6 categories and according to prognosis on their treatment into
improved and ...
0
votes
2answers
141 views
convert annual data to quarterly frequency
I was wondering if there is a package I can use to convert my 22 annual observations to quarterly series?
Will there be any harm in doing so? will I loose any important data specific info? I want to ...
0
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0answers
25 views
How to read the table to get cumulative relative frequencies?
there is a question i can not answer.
Suppose the numbers in the following random number table correspond to people arriving for work at a large factory. Let 0,1,and 2 be smokers and 3-9 be ...
0
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0answers
61 views
Frequency Table for Repeated Measures
I've 12 unique subjects, and in total I've almost 1700 observations.
I've an ordinal response variable (has 4 levels) and 3 categorical covariates (each one has different levels 3, 5, 2, and 4 ...
4
votes
1answer
89 views
How to test for a break in a time series cycle
I've been scratching my head over this issue and would appreciate some help. I have a time series from 1920-2011 which I've used a Baxter Kings filter on to detrend. I would like to test whether the ...
1
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0answers
100 views
Frequency data differences test across two groups
I am looking into contrasting two groups with regards to frequency differences over a few time points.
To make it clearer:
I have for group 1, the frequency difference 5; 4; 1; 2; 3
and for group 2: ...
0
votes
0answers
30 views
Co-efficient of variation to eliminate frequency bias in vector
I need to determine the significance of a certain variable (i.e. cue) that co-occurs with an element of a particular class. I am working with vectors that are similar to this:
...
1
vote
0answers
78 views
On the uniform convergence of relative frequencies of events to their probabilities
I have read the article by Vapnik, Chervonenkis "On the uniform convergence of relative frequencies of events to their probabilities" Theory of Probability and Its Applications, vol XVI, n. , 1971.
...
0
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0answers
50 views
finding x intercept from a set of values
I have run an ACF on a function in R and it returns:
Autocorrelations of series ‘sine.curve’, by lag
...
0
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3answers
81 views
Is there any dataset or api that gives a list of infrequent words? [closed]
I'm actually working on an information retrieval project, and I want to extract words that are of significance from a sentence. This is somewhat opposite to stopwords.
In a sentence like: He was a ...
0
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0answers
56 views
what does histogram mean in a deterministic signal?
I have a deterministic signal comming from an experiment:
x1[n]=[2,3,2,4,1,4] as a set={1,2,3,4} histogram={1/6,2/6,1/6,2/6}
what does the histogram(number of occurence of each value) mean in the ...
3
votes
1answer
293 views
Visualization of binned frequency distribution in R
I am trying to visually represent the distribution of last names in the US. Specifically, I am trying to show that the distribution is such that the most common names (say the top 50) are very common ...
3
votes
1answer
93 views
Frequency/harmonic analysis of accents
I am looking to find out how accents could/would be detected by a programme, I haven’t as of yet undergone an experiment into detecting or observing anything noticeable about recorded accents. I am ...
1
vote
1answer
208 views
Is the Cochran-Mantel-Haenszel test the correct test for these frequency data?
I have some satellite tag time-at-depth (TAD) frequency data that I would like some help with.
The data was transmitted via satellite as percent time spent in each of 7 depth bins (0m, 0-1m, 1-10m, ...
0
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0answers
267 views
How to calculate percent variation
I've came across a method in research communication, where different percentages of variation were calculated for a collection of ratio values for some proteins. As seen in the figure, the frequency ...
1
vote
1answer
115 views
Variable frequency redistribution
I know that there is a way to "redistribute the frequencies of a variable" as stated here:
Slide number 14 and 15 about redistribution
and here:
Dorian Pyle book chapter 7 section 2 paragraph 3 ...
0
votes
2answers
134 views
Is it allowed to average annual frequencies to make a time series regular?
I have a time series with observations that were collected quasi fortnightly over several years. However, there are between 23 and 26 observations per year. The time series is not equidistant, due to ...
0
votes
0answers
85 views
What is a good voting system that is based on a value and number/frequency of votes?
So let's suppose there are n candidates running for office. A bunch of random people begin to selectively vote the candidates, each vote being a number from 1 to n. What is a good way to order the ...
2
votes
1answer
869 views
How to determine percentiles/quantiles in SPSS?
I am really new to statistics and now I have some data and I want to make a frequency table with the yearly salary (a variable in my data). In the end, I need to be able to say what is the maximum ...
3
votes
0answers
176 views
Poisson Rate Regression: Offset?
I'm comparing two groups on the # of hospitalizations they have in a 5 year period. Length of hospitalization stay is highly variable. For example, a patient might have 3 hospitalizations that in ...
2
votes
1answer
54 views
Get frequency of a noisy sample
I'm writing you because i mostly need a general algorithm, or even a hint, which i will afterwards port on my system (an embedded Arduino microcontroller);
I have a set of around 650 samples covering ...
2
votes
1answer
75 views
Frequency ratio test with correlation structures
I have some data about two machines, each machine has 10-15 operation logs, and inside the log are the time-stamped status checks that takes on the value of 1 if ...
6
votes
2answers
245 views
What's a good approach to estimate the probability of word frequencies?
I have a document corpus and I want to estimate the probability of occurrence of a certain word $w$. Simply calculating the frequencies and use such a number as an estimation is not a good choice. Is ...
1
vote
1answer
225 views
Chi-square test problem (and some more maybe)
A colleague of mine has asked me for help on this problem, but I am confused with it as well, the main question he asked me was that the chi-square result he was getting was very high.
He conducted a ...
0
votes
1answer
310 views
How to plot frequencies vs. values in SAS (power-law style graph)?
I have a set of counts as a response variable (anywhere from 0 to 85). I want to find the easiest way to plot count on the y-axis vs frequency of that count on the x-axis, the type of plot you see in ...
