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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 = GGG = 80 (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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 Spring '07
 Guggenberger
 Economics

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