# Questions tagged [lognormal]

A lognormal distribution is the distribution of a random variable whose logarithm has a normal distribution.

523 questions
Filter by
Sorted by
Tagged with
20 views

### Comparing Discrete Lognormal Distributions

Is it possible to have the following: Create an approximation of the discrete lognormal distribution? Given a discrete distribution in the form of a histogram, is it possible to compare its ...
15 views

27 views

### Question about the decision between normal and lognormal distribution in a linear model

I hope someone could help me with the following problem: If I create a linear model that predicts the height of people (y) with the following parameters: y = a + b*(xi-xavg) with "a" the normally ...
37 views

### Sum of dependant log-normal distributions with large uncertainties

I need to sum many lognormal distributions, which are correlated among them. My distributions simulate vary uncertain gas emissions. I know their mean value, the percentage uncertainty (defining the ...
54 views

### QQ plot distribution check

I want to check if a distribution is log normal or not by using qq plot. So for convenience I am creating a lognormal distribution using stats and checking it in ...
63 views

### In the case of lognormal distribution, when can the median be more efficiently estimated than the mean?

I understand, that in the case of normal distribution, the estimation of the mean (from samples) is more efficient (i.e. of less risk), than the estimation of the median. According e.g. to this post, ...
659 views

### Predicting y from log y as the dependent variable

In the book Introductory Econometrics by Wooldridge the chapter, which deals with predicting values of $\hat{y}$ (chapter 6.4 in the 5th edition) states the following: If the estimated model is: ...