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HLTB15H3 (77)
Lecture 7

Lecture 7 - Part I

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University of Toronto Scarborough
Health Studies
Caroline Barakat

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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