Answered: CHOOSE THE LETTER OF THE CORRECT ANSWER…

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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Question

CHOOSE THE LETTER OF THE CORRECT ANSWER NO NEED FOR EXPLANATION.

A. Simple Random Sampling

B. Stratified Sampling

C. Systematic Sampling

D. Cluster Sampling

E. Other:

1. The researcher has a population total of 100 individuals and need 12 subjects. He first picks his starting number, 5. Then the researcher picks his interval, 8. The members of his sample will be individuals 5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 85, 93.

2. A city public health veterinarian selected 50 out of 500 street corners and designated a resident at each corner to count the number of stray dogs for one week.

3. A city public health veterinarian selected 50 out of 500 street corners and designated a resident at each corner to count the number of stray dogs for one week.

4. The names of 25 employees out of 250 are chosen out of a hat is an example of the lottery method at work. Each of the 250 employees would be assigned a number between 1 and 250, after which 25 of those numbers would be chosen.

5. A test addressing physical development over time could use the student body of a school as a population by grade, and then take random samples from each grade.

6. A company interested in brand penetration may lack the resources to survey an entire city. Instead, they divide the city based on area, and test the popularity of their brand.

7. Local government testing a possible new policy might divide its jurisdiction into by party affiliation.

8. A charity tracking the occurrence of a particular illness divide all affected areas by percentage of affected people, and testing only those above a certain percentage.

9. Opinion surveys on specific political issues commonly stratify according to respondents' party affiliation (or lack thereof), then take samples from each.

10. An advertising firm, interested in determining how much to emphasize television advertising in a certain county decides to conduct a sample survey to estimate the average number of hours each week that households within that county watch television. The county has two towns, A and B, and a rural area C. Town A is built around a factory and most households contain factory workers with school-aged children. Town B contains mainly retirees and the rural area C are mainly farmers.