by central limit theorem 12. Suppose that X1, X2, ..., X 40 denote a random sample...
12. Suppose that X1, X2, ,X40 denote a random sample of measurements on the proportion of impurities in iron ore samples.Let each variable X, have a probability density function given by 3x2 0<1 elsewhere fx(x)= The ore is to be rejected by the potential buyer if sample of size 40. X, exceeds 2.8. Estimate P( X,> 2.8) for the
Suppose that X. X. .... Xso denote a random sample of measurements on the proportion of impurities in iron ore samples. Let each variable X, have a probability density function given by fx/X) = 3x2 0<x< 1. The ore is to be rejected by the potential buyer if X1 + X2+...+X40 exceeds 2.8. Let X = X1 + X2 + ....+X40. Find Var). Answer:
Let X1, X2, ..., Xn denote a random sample of size n from a population whose density fucntion is given by 383x-4 f S x f(x) = 0 elsewhere where ß > 0 is unknown. Consider the estimator ß = min(X1, X2, ...,Xn). Derive the bias of the estimator ß.
Let X1, X2, ..., X48 denote a random sample of size n = 48 from the uniform distribution U(?1,1) with pdf f(x) = 1/2, ?1 < x < 1. E(X) = 0, Var(X) = 1/3 Let Y = (Summation)48, i=1 Xi and X= 1/48 (Summation)48, i=1 Xi. Use the Central Limit Theorem to approximate the following probability. 1. P(1.2<Y<4) 2. P(X< 1/12)
Central limit theorem 9. Suppose that a random variable X has a continuous uniform distribution fx(3) = (1/2,4 <r <6 o elsewhere (a) Find the distribution of the sample mean of a random sample of size n = 40. (b) Calculate the probability that the sample mean is larger than 5.5.
Let X1,X2,...,Xn denote a random sample from the Rayleigh distribution given by f(x) = (2x θ)e−x2 θ x > 0; 0, elsewhere with unknown parameter θ > 0. (A) Find the maximum likelihood estimator ˆ θ of θ. (B) If we observer the values x1 = 0.5, x2 = 1.3, and x3 = 1.7, find the maximum likelihood estimate of θ.
Problem 1 (20 points). Suppose X1, X2, ... , Xn are a random sample from the uniform distribution over [0, 1]. (i) Let In be the sample mean, derive the Central Limit Theorem for år. (ii) Calculate E(X) and Var(x}). (iii) Let Yn = (1/n) - X. Derive the Central Limit Theorem for Yn. (iv) Set Zn = 1/Yn. Derive the Central Limit Theorem for Zn.
6. Let X1, . . . , Xn denote a random sample (iid.) of size n from some distribution with unknown μ and σ2-25. Also let X-(1/ . (a) If the sample size n 64, compute the approximate probability that the sample mean X n) Σηι Xi denote the sample mean will be within 0.5 units of the unknown p. (b) If the sample size n must be chosen such that the probability is at least 0.95 that the sample...
Suppose that X1,X2,. X are iid random variables with pdf ,220 (a) Find the maximum likelihood estimate of the parameter a (b) Find the Fisher Information of X1,X2,.. ., Xn and use it to estimate a 95% confidence interval on the MLE of a (c) Explain how the central limit theorem relates to (b).
X denote the mean of a random sample of size 25 from a gamma type distribu- tion with a = 4 and β > 0. Use the Central Limit theorem to find an approximate 0.954 confidence interval for μ, the mean of the gallina distribution. Hint: Use the random variable (X-43)/?7,/432/25. 6. Let Yi < ½ < < }, denote the order statistics of a randon sample of size n from a distribution that has pdf f(z) = 4r3/04, O...