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Lecture 7

Lecture 7 - Part I

4 Pages
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Department
Health Studies
Course Code
HLTB15H3
Professor
Caroline Barakat

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Lecture 7 Undertaking Research: Sampling Methods
The Concept of Sampling
Selecting a few from a bigger group
Advantages: saves financial and human resources
Disadvantages: estimation or prediction possibility of error!
Sampling in Qualitative Research
Saturation point that is, keep going as long as one keeps discovering new
information
Keep in mind saturation point is a subjective judgement
Sampling Terminology
Population / study sample (N)
Sample
Sample size (n)
Sampling design / strategy
Sampling unit / sampling element
Sampling frame
Sample statistics
Population parameters or population mean
Example:
Objective: to examine the incidence of childhood obesity in school-aged children
in Canada
Population / study sample (N) all children between the age of 5 and 11 years
Sample x number of children selected from the study sample
Sample size n = 2000
Sampling design / strategy random, stratified.....
Sampling unit / sampling element if a multi-stage sample, then could be schools, grades
selected, and individuals
Sampling frame a list of schools, grades, students
Sample statistics data related to who is obese or not
Population parameters or population mean can only be obtained if all children aged 5 -11
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Description
Lecture 7 Undertaking Research: Sampling Methods The Concept of Sampling Selecting a few from a bigger group Advantages: saves financial and human resources Disadvantages: estimation or prediction possibility of error! Sampling in Qualitative Research Saturation point that is, keep going as long as one keeps discovering new information Keep in mind saturation point is a subjective judgement Sampling Terminology Population study sample (N) Sample Sample size (n) Sampling design strategy Sampling unit sampling element Sampling frame Sample statistics Population parameters or population mean Example: Objective: to examine the incidence of childhood obesity in school-aged children in Canada Population study sample (N) all children between the age of 5 and 11 years Sample x number of children selected from the study sample Sample size n = 2000 Sampling design strategy random, stratified..... Sampling unit sampling element if a multi-stage sample, then could be schools, grades selected, and individuals Sampling frame a list of schools, grades, students Sample statistics data related to who is obese or not Population parameters or population mean can only be obtained if all children aged 5 -11 www.notesolution.com
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