# Tagged Questions

1answer
79 views

### Choosing a method for random sampling a small sample size economic dataset in R: fitting probability dist function or sample()

I have a dataset of energy demand with a small sample size: ...
0answers
144 views

### How to decide whether the distribution is unimodal or bimodal in grain size distribution?

In the examples given at this link, I am not able to decide whether the distribution is unimodal or bimodal. I think it is in between unimodal and bimodal, but I do not know if this kind of class ...
0answers
51 views

### Bias in EM estimation for a mixture of normal distributions

Are the parameter estimates for a mixture of two normal distribution using EM algorithm biased or unbiased? More specifically, if I use the EM-algorithm to obtain ML estimates of $μ_1$, $μ_2$, ...
3answers
224 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 ...
0answers
26 views

### Compendium or catalog of compound distributions?

Does anyone know of a good compendium or catalog of compound distributions, or finite mixture representations of those distributions? I am trying to find out to what extent the common ...
0answers
28 views

### Approximating a compound distribution with a mixture: required n?

Suppose you have two continuous distributions, g(φ; θ) and f(θ; x), where φ and θ are parameter vectors of g and f, respectively, and the values of θ generated by g are all legal values for θ in f(θ; ...
0answers
35 views

### If pop's have the same distribution but different parameters, can the merged population also have that distrib?

There is a substantial literature on identifying the best-fitting distribution for income and wealth data. Candidates have included the log-normal, Gamma, Singh-Maddala, Dagum type I and generalized ...
1answer
65 views

### Probability distribution for varying probabilities in R [duplicate]

I'd like to plot the probability distribution for a set of binomial trials in R, the catch is that each trial has an independent probability of success (which I have in vector form). So, in R if I ...
1answer
96 views

### Long-tailed distribution of time events

Suppose you have the logs of a web server. In these logs you have tuples of this kind: ...
0answers
214 views

### Separation of multiple overlapping normal distributions

The problem is separation of multiple normal distributions of fish length, each normal distribution representing a distinct year class contributing to the overall population in a long-lived species. ...
2answers
2k views

### Separating the populations in a bimodal distribution

I have a data set which displays a bimodal distribution. This was determined by plotting a histogram of the frequency vs number. I now need to separate the two original populations and therefore ...
1answer
389 views

### Fitting 4-moment distribution with mixture gaussian

I know that Mclust does the fit on its own but I am trying to implement an optimization with the aim to generate a mixture of 2 gaussians with the combine moments as closed as possible to the moment ...