lognormal distribution


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log·nor·mal dis·tri·bu·tion

if a variable y is such that x = log y, it is said to have a lognormal distribution; this is a skew distribution.

lognormal distribution

see lognormal distribution.
References in periodicals archive ?
We will focus on evaluating the impact of the standard deviation of fingerprints on positioning accuracy and use the lognormal distribution for probabilistic position estimation, as it was proven to best fit the RSS histograms for collected fingerprints.
According to Dias (2015), if P follows a GBM, considering the initial value of P (P0), then its future values P(t) have lognormal distributions with the following mean and variance:
chem Individual-based estimates, 138 larger dataset Alternative with population- 119 based estimates, smaller dataset Alternative with individual- 119 based estimates, smaller dataset Range of alternatives with 137 individual-based estimates, leave-one-out, full dataset Analysis Lognormal distribution of [TDVM.
Suppose a random variable X, distributed according to the lognormal distribution with parameters ([mu], [sigma]), represents operational losses.
We employ Poisson distribution failure model with [lambda]=19 and Lognormal distribution restoration model with [mu]=1, [delta]=0.
Then, we obtained statistical simulations of time-dependent responses with normal and lognormal distributions, which were subsequently summarized in order to obtain the statistical distribution of the injury risk.
Note that the expression above matches the pdf of a mixture of three-parameter lognormal distributions, which is a generalization of the pdf given in (16), and we use the notation X ~ LSMIX([[lambda].
This holds true for Fisk distribution regarding log- likelihood, BIC and chi-square criteria while lognormal distribution is showing slight improvement on the basis of SAE and SSE criteria.
It is estimated [6], that IRW has the form of lognormal distribution with parameters depending on the age of the person consuming water.
c], the lognormal distribution appeared to better describe the distribution.