HLTB15H3 Lecture Notes - Lecture 7: Normal Distribution, Systematic Sampling, Standard Deviation

64 views3 pages
1 Mar 2011
School
Department
Course
Cluster Sampling
Sampling units are not easily identified!
Cluster sampling - sampling population is
i)divided into groups clusters
ii)elements within each cluster are selected
Different levels of clustering are possible!
Example:
Cluster 1 all provinces or territories
Cluster 2 major cities
Cluster 3 school boards
Cluster 4 schools
This process is called multi-stage cluster sampling
NON-RANDOM (NON-PROBABILITY) SAMPLING DESIGNS
Does not follow the theory of probability!
Number of elements either unknown or cannot be individually identified
Types of non-random sampling designs
Quota Sampling
Access
Visible characteristic
Consent to participate
Accidental sampling
-not based on an obvious or visible characteristic
-common among market research and media
Judgemental or purposive sampling
-Who can provide the best information?
-Application - construction of a historical reality or description of a phenomenon
Advantages:
-Least expensive
-No need for information on sampling frame, sample elements, location....
-Inclusion of participants needed for the study
Disadvantages:
-Findings cannot be generalized
Snowball Sampling
Networks
Few individuals are selected
Asked to identify other individuals
www.notesolution.com
Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Cluster sampling - sampling population is i) ii) divided into groups clusters elements within each cluster are selected. cluster 1 all provinces or territories. Non-random (non-probabil i ty) sampl i ng designs. does not follow the theory of probability! number of elements either unknown or cannot be individually identified. consent to participate not based on an obvious or visible characteristic common among market research and media. Application - construction of a historical reality or description of a phenomenon. No need for information on sampling frame, sample elements, location characteristics of both random and non-random sampling designs. the greater the heterogeneity or diversity, the greater the number of respondents needed. 1: degree of accuracy level of variation. Objective: to estimate the age of students in this lecture hall: assume willing to tolerate an error of 0. 5 years, confidence level 95, assume standard deviation is within 2 years.

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers