Class Notes (1,200,000)

CA (650,000)

UTSC (30,000)

Health Studies (1,000)

HLTB15H3 (100)

Caroline Barakat (20)

Lecture 7

Department

Health StudiesCourse Code

HLTB15H3Professor

Caroline BarakatLecture

7This

**preview**shows page 1. to view the full**4 pages of the document.**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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