1 A procurement specialist has purchased 27 resistors from vendor 1 and 29 resistors from vendor 2. Let X1,1, X1,2,..,X27 represent thevendor 1 observed resistances, which are assumed to be normally and independently distributed with mean 90 ohms and standarddeviation 1.3 ohms. Similarly, let X21, X22,...,X29 represent the vendor 2 observed resistances, which are assumed to be normally andindependently distributed with mean 97 ohms and standard deviation of 1.9 ohms. What is the sampling distribution of X - X2?What is the standard error of X - X 2?The sampling distribution of X1 – X2 is N(ux-x,i(Round the second answer to four decimal places.)The standard error of X1- X2 is i(Round your answer to three decimal places.)Statistical Tables and Charts

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Answered: A procurement specialist has purchased…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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If X1, X2, ... , Xn constitute a random sample from anormal population with μ = 0, show that ni=1X2inis an unbiased estimator of σ2.
Suppose X, Y, Z are iid observations from a Poisson distribution with parameter λ, which is unknown. Consider the 3 estimators T1 = X + Y − Z, T2 = 2X + Y + Z 4 , T3 = 3X + Y + Z 5 . (a) Which among the above estimators are unbiased? (b) Among the class of unbiased estimators, which has the minimum variance?
Let X1, X2, …, Xn be a random sample from the Normal distribution N() (a) Using method of moments to estimate the parameters and . (b) Are those estimators unbiased?
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