PracticeQuestions6 - Practice Questions 6 QUESTIONS 1 THROUGH 3 ARE BASED ON THE FOLLOWING INFORMATION Let 1 X 2 X 3 X and 4 X be a random sample

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Practice Questions 6 QUESTIONS 1 THROUGH 3 ARE BASED ON THE FOLLOWING INFORMATION: Let 1 X , 2 X , 3 X , and 4 X be a random sample of observations from a population with mean and variance 2 . Consider the following two point estimators of : 1 ˆ = 0.10 1 X + 0.40 2 X + 0.40 3 X + 0.10 4 X and 2 ˆ = 0.20 1 X + 0.30 2 X + 0.30 3 X + 0.20 4 X 1. Which of the following is true? A) 1 ˆ is biased, but 2 ˆ is unbiased estimator of . B) 1 ˆ is unbiased, but 2 ˆ is biased estimator of . C) Both 1 ˆ and 2 ˆ are unbiased estimators of . D) Both 1 ˆ and 2 ˆ are biased estimators of . 2. Which of the following is true? A) Var ( 1 ˆ ) = Var( 2 ˆ ). B) Var ( 1 ˆ ) > Var( 2 ˆ ). C) Var ( 1 ˆ ) < Var( 2 ˆ ). D) Cannot tell the relationship between Var ( 1 ˆ ) and Var ( 2 ˆ ). 3. Which of the following is true? A) The relative efficiency of 2 ˆ to 1 ˆ is 0.67. B) The relative efficiency of 1 ˆ to 2 ˆ is 1.30 C) 1 ˆ is the more efficient estimator of than 2 ˆ . D) 2 ˆ is the more efficient estimator of than 1 ˆ . 4. In a recent survey of 600 adults, 16.4% indicated that they had fallen asleep in front of the television in the past month. Which of the following intervals represents a 96% confidence interval for the population proportion? A) 0.137 to 0.192 B) 0.140 to 0.189 C) 0.133 to 0.195 D) 0.143 to 0.186 5. The amount of material used in making a custom sail for a sailboat is normally distributed. For a random sample of 15 sails, you find that the mean amount material is 912 square feet, with a standard deviation of 64 square feet. Which of the following represents a 99% confidence interval for the population mean amount of material used in a custom sail? A) 912 49.2 B) 912 42.6 C) 912 44.3 D) 912 46.8 6. Let 1 X , 2 X , 3 X , and 4 X be a random sample of observations from a population with...
View Full Document

This note was uploaded on 04/13/2008 for the course ECON 329 taught by Professor Yilmaz during the Spring '08 term at University of Texas at Austin.

Page1 / 5

PracticeQuestions6 - Practice Questions 6 QUESTIONS 1 THROUGH 3 ARE BASED ON THE FOLLOWING INFORMATION Let 1 X 2 X 3 X and 4 X be a random sample

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online