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Unformatted text preview: Economics 41 Statistics for Economics Homework Assignment 4  Solutions: By Kenneth Lee – Your Name: Your TA's Name: NOTE: Please show your calculations for Questions 34, 6, 9, 1215. The exercises are from the textbook (Weiss: Introductory Statistics). Sampling Distributions, Basics. 1. The sampling distribution is the probability distribution of a: (a) sample (b) sample with replacement (c) sample without replacement (d) sample statistic 2. A population contains 10 members. The total number of samples of size four that you can draw (without replacement) from this population is: (a) 40,320 (b) 56 (c) 6 (d) 210 3. Solve Exercise 7.3 (a) g = G¡¢£¤¢£¥¢G£¢G¤ ¥ = 80 ¦§¨ℎ©ª (b) Sample Heights (inches) « ¬ B,D 79, 84 81.5 B,R 79, 85 82.0 B,G 79, 78 78.5 B,P 79, 74 76.5 D,R 84, 85 84.5 D,G 84, 78 81.0 D,P 84, 74 79.0 R,G 85, 78 81.5 R,P 85, 74 79.5 G,P 78, 74 76.0 (c) (d) 0 (e) P( g G u ¡ ¢ £ ¡ g ¤ u ) = 3 chance that the average h population mean height. 4. Solve Exercise 7.6 (b) Sample Heights (inches) ¢ £ B,D,R,G 79, 84, 85, 78 81. B,D,R,P 79, 84, 85, 74 80. B,D,G,P 79, 84, 78, 74 78. B,R,G,P 79, 85, 78, 74 79. D,R,G,P 84, 85, 78, 74 80. (c) (d) 0 (e) P( g G u ¡ ¢ £ ¡ g ¤ u ) = 3/5 chance that the average height of mean height. 5. The mean age of all students 100 students selected from th the: (a) probability error (b) nonsampling error (c) sampling error 75 76 77 78.5 79 79.5 3/10. If a random sample of two players is take height of the two players selected will be with ¢ £ .50 .50 .75 .00 .25 /5. If a random sample of two players is taken f the two players selected will be within 1 inch...
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This note was uploaded on 05/31/2010 for the course ECON 41 taught by Professor Guggenberger during the Spring '07 term at UCLA.
 Spring '07
 Guggenberger
 Economics

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