Normal Probability Plot: Definition, Examples

Weibull Lognormal Distribution

SOLVED:A random variable Y is said to have a log-normal distribution if X=ln(Y) has a normal distribution. (The symbol In denotes natural logarithm.) In this case Y must be non negative. The shape of the log-normal probability density function is similar to that of the gamma distribution, with a long tail to the right. The equation of the log-normal density function is given by f(y)={ .(1)/(σ y √(2 π)) e^-(ln (y)-μ)^2 / 2 σ^2), y>0 0, elsewhere . Because ln(y) is a monotonic fu