Find the variance of the monte carlo estimate

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Reference no: EM131219049

Repeat given Exercise using random variables X that follow a Gaussian distribution . Also, for parts (b)-(d) use a shifted distribution for the importance sampling estimator of the form Also, for this problem

Exercise

Suppose the random variable X has an exponential distribution, We wish to estimate the probability of the event via simulation. We will compare the standard Monte Carlo estimate,

where the random variables X_i are chosen according to the exponential distribution specifed by PDF with an importance sampling estimate,

where the random variables are chosen from a suitable distribution specified by its PDF Note that both estimators are unbiased, so we will compare these estimators by examining their variances.

(a) Find the variance of the Monte Carlo estimate.

(b) Find the variance of the IS estimator assuming that the random variables are chosen from a scaled exponential distribution

(c) Assuming that X_O= 20 find the value of a that minimizes the variance of the IS estimator using the scale exponential distribution.

(d) How much faster do you expect the IS simulation to run as compared to the MC simulation?

Reference no: EM131219049

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