(Solved) Let Y_1, ..., Y_n denote independent random variables having the log normal density (1)/((y-φ) √2 π σ^2) \exp -(1)/(2 σ^2)[log


Question: Let \(Y_{1}, \ldots, Y_{n}\) denote independent random variables having the log normal density

\[\frac{1}{(y-\phi) \sqrt{2 \pi \sigma^{2}}} \exp \left\{-\frac{1}{2 \sigma^{2}}[\log (y-\phi)-\mu]^{2}\right\}, \quad y>\phi, \quad \sigma>0, \mu, \phi \in \mathbb{R}\]

where \(\sigma, \phi, \mu\) are unknown parameters. Find the profile \(\log\) likelihood \(\ell_{\mathrm{p}}(\phi)\), and investigate what happens to it and to the maximum likelihood estimates of \(\mu\) and \(\sigma\) when \(\phi \nearrow y_{(1)} .\) Discuss.

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Solution: The downloadable solution consists of 1 pages
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