Normal and lognormal distributions are completely specified by their
A)mean only.
B)mean and standard deviation.
C)standard deviation only.
D)third moment only.

Question

Quizplus · Accepted Answer

Both normal and lognormal distributions can be completely specified by their mean and standard deviation. For a normal distribution, both the mean and standard deviation determine the shape and location of the distribution. For a lognormal distribution, taking the logarithm of the data results in a normal distribution, so the mean and standard deviation of the logarithm of the data can be used to fully describe the distribution of the original data.

Normal and Lognormal Distributions Are Completely Specified by Their