Linked Questions

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1answer
1k views

Fitting data to a log-normal distribution [duplicate]

For a simulation study I've been trying to find an appropriate distribution for job handling times in R. I have a very large dataset of 77010 records (handling time in seconds). I've been exploring ...
0
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1answer
376 views

Finding a suitable distribution for data in R? [duplicate]

I have a set of data with summary as below: The data are non-normal and transformations did not obtain normality. Given the data are continuous I have narrowed the range of distribution down to '...
19
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1answer
27k views

Weibull distribution parameters $k$ and $c$ for wind speed data

Hi can the same be shown to obtain shape and scale parameter for modified maximum likelihood method
4
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2answers
28k views

How find a distribution for a set of data?

Hi I have a set of data(message with different size) in excel like (over 5000 entries): ...
9
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3answers
1k views

Different non-parametric methods for estimating the probability distribution of data

I have some data and was trying to fit a smooth curve to it. However, I do not want to enforce too many prior beliefs or too strong pre-conceptions (except the ones implied by the rest of my question) ...
7
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3answers
6k views

Fitting mixture distributions and computing goodness-of-fit?

This question is a follow-up from a previous question of mine here. Thanks to @Glen_b, @gung and @rbatt for teaching me so many new things yesterday. It was mentioned in passing that mixture ...
7
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1answer
5k views

Goodness of fit test for a mixture in R

I just estimated the parameters for a mixture of two gaussians with different means and different sigmas, I would like to test if the data adjusts well to the explicit form of the mixture, do I ...
3
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1answer
2k views

What is a density function?

I know about histograms and also know that if we connect the mid-points on the top of bars in a histogram we will get a frequency polygon. This polygon could then be 'smoothed' in a way that it ...
3
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4answers
335 views

How to model distributions which are not normally distributed

I would like to model the performance of a rainwater tank, which has a stochastic input (rainfall). The data are the empty volume in the tank at the end of each day. The values are skewed towards the ...
2
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1answer
2k views

How to find the distribution of data with data fitting

I need to do data fitting to find the distribution of given data. I need to find the PDF function of the distribution. I can use data fitting functions in MATLAB and Python. It looks like a ...
5
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1answer
2k views

Determining probability distribution for datasets with missing values

As a part of my exploratory data analysis (EDA) prior to further analysis, I'm trying to determine a probability distribution of my pilot dataset's variables. A particular feature of this dataset is a ...
10
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0answers
3k views

How do I identify the “Long Tail” portion of my distribution?

I have a number of series that would typically be described as normal skewed or Gamma distributed. For example, say I have a group of customers and have calculated their spend over a fixed length of ...
3
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2answers
831 views

Determining distribution of a set of ordered numbers

I've always wondered this. Let's say someone gives you a spreadsheet with a large set of numbers, say 10,000, and says "What distribution does this set of numbers follow (Gaussian, exponential, ...
3
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1answer
413 views

Why don't I see my points on Cullen and Frey graph?

I have a set of data of 5 members. based on some previous questions , I was expecting to see where my actual points are located on the graph. in my case I see the theoretical but not my points. just ...
0
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1answer
427 views

Continue from my previous question - distribution for a set of data using R results

Follow the very useful answers from Peter Flom, Wayne and many others. I have now started using R and it gives me a feeling of python :) The results are below but I am not sure how should I go from ...

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