Suppose that X has a lognormal distribution and that the

Chapter 4, Problem 174E

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QUESTION:

Suppose that X has a lognormal distribution and that the mean and variance of X are 100 and 85,000, respectively. Determine the parameters \(\theta\) and \(\omega^{2}\) of the lognormal distribution. [Hint: define x = exp \((\theta)\) and y = exp \(\left(\omega^{2}\right)\) and write two equations in terms of x and y.]

Equation transcription:

Text transcription:

(\theta)

\theta

\left(\omega^{2}\right)

\omega^{2}

Questions & Answers

QUESTION:

Suppose that X has a lognormal distribution and that the mean and variance of X are 100 and 85,000, respectively. Determine the parameters \(\theta\) and \(\omega^{2}\) of the lognormal distribution. [Hint: define x = exp \((\theta)\) and y = exp \(\left(\omega^{2}\right)\) and write two equations in terms of x and y.]

Equation transcription:

Text transcription:

(\theta)

\theta

\left(\omega^{2}\right)

\omega^{2}

ANSWER:

Step 1 of 3

Given,

Mean,

Variance,

The Mean of Lognormal Distribution is,

The Variance of Lognormal Distribution is,

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