Log in
HomeTextbook Notes300,000CA170,000

ECON 2200 Chapter Notes - Chapter 7: Simple Random Sample, Central Limit Theorem, Statistic

103 views3 pages
School
Trent University
Department
Economics
Course
ECON 2200
Professor
Malcolm M

For unlimited access to Textbook Notes, a Class+ subscription is required.

Document Summary

To contact the whole population would be time consuming. The cost of studying all the items in a population may be prohibitive. The physical impossibility of checking all items in the population. A sample selected so that each item or person in the population has the same chance of being included. We can select a simple random sample by using a table of random numbers. The items or individuals of the population are arranged in some order. A starting point is selected randomly and then every kth member of the population is selected for the sample. K is calculated as the population size divided by the sample size. When the physical order is related to the population characteristic, then systematic random sampling should not be used. A population is divided into groups, called strata, and a sample is randomly selected for each stratum. It guarantees that each group is represented in the sample.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents

STT 201 Lecture Notes - Lecture 30: Simple Random Sample, Convenience Sampling, Cluster Sampling
harlequinsalmon729
ISDS 2000
Final Exam
Study Guide
ISDS 2000 : ISDS EXAM 2
azuremammoth471
PSY 250 Lecture Notes - Lecture 7: Observational Error, Psy, Simple Random Sample
skykangaroo617

Related Questions

Econ 3050

7. When every member of the accessible population has an equal chance of being selected to participate in the study, the researcher is using:

a) Simple random sampling

b) Stratified random sampling

c) Convenience sampling

d) Purposive random sampling

8. A regression line has been found that has nearly all the points lying directly on the line, and only a few of them stray away from the line. Therefore, the standard error of the estimate is likely to be

Huge.

Small.

0.

Undefined.

9. Correlation coefficient ranges from _______ to ____________.

a) - 1 to 0.

b) 0 to 1.

c) -1 to 1.

d) None of the above.

10. The correlation coefficient of determination is the:

a) Ratio of the explained variation to the total deviation.

b) Ratio of the unexplained deviation to the explained deviation.

c) Ratio of the unexplained deviation to the total variation.

d) Ratio of the explained variation to the total variation.


11. If the correlation coefficient r = 0.5 then the coefficient of determination is:

a) 0.10

b) 0.25

c) 1.00

d) 2.50

12. Which one of the following is NOT appropriate for studying the relationship between two quantitative variables?

Scatterplot

Bar chart

Correlation

Regression

13. In regression, an independent variable is sometimes called a response variable.

True

False

14. The simple linear regression equation can be written y = b0 + b1x. In the simple linear regression equation, the symbol y represents:

The average or predicted response

Estimated intercept

Estimated slope

Explanatory variable