Purchase Solution

Population Analysis

Not what you're looking for?

Ask Custom Question

27. A random sample of n observations is taken from a population... SEE ATTACHMENT

Attachments
Purchase this Solution

Solution Preview

a) since u^ = C1 X1 + C2 X2 + ... + Cn Xn
then the expected value of u^ is:
E(u^)= E( C1 X1 + C2 X2 + ... + Cn Xn )
= E(C1 X1) + E(C2 X2) + ... + E(Cn Xn )
= C1 E(X1) + C2 E(X2) + ... + Cn E(Xn )

also, because E(Xi) = u for all i = 1, 2, ... n
Then E(u^)= C1* u + C2*u + ... + Cn*u
= (C1 + C2 + ... + Cn) u
so for u^ to be unbiased, we need E(u^) = u, or
(C1 + C2 + ... + Cn) u = u
therefore, (C1 + C2 + ... + Cn) = 1 is the necessary and sufficient condition for u^ to be ...

Purchase this Solution


Free BrainMass Quizzes
Managing the Older Worker

This quiz will let you know some of the basics of dealing with older workers. This is increasingly important for managers and human resource workers as many countries are facing an increase in older people in the workforce

Change and Resistance within Organizations

This quiz intended to help students understand change and resistance in organizations

Cost Concepts: Analyzing Costs in Managerial Accounting

This quiz gives students the opportunity to assess their knowledge of cost concepts used in managerial accounting such as opportunity costs, marginal costs, relevant costs and the benefits and relationships that derive from them.

Employee Orientation

Test your knowledge of employee orientation with this fun and informative quiz. This quiz is meant for beginner and advanced students as well as professionals already working in the HR field.

Team Development Strategies

This quiz will assess your knowledge of team-building processes, learning styles, and leadership methods. Team development is essential to creating and maintaining high performing teams.