非隨機抽樣和隨機抽樣的比較-展示頁
2025-03-14 13:27本頁面
【正文】 quired sample size has been reached Selecting a nonprobability sampling technique Slide Saunders, Lewis and Thornhill, Research Methods in Business, 4th Edition 169。 total number of responses ? Total Response rate = total number in sample ineligible total number of responses ? Active Response rate = total number in sample – (ineligible + unreachable) Population, sampling frame, samples Select appropriate sampling technique ? Five main sampling techniques (1) simple random (2) systematic (3) stratified random (4) cluster (5) multistage sampling technique (1)Simple random sampling (a) Number each case in your sampling frame with a unique number (b) Select cases using random numbers until your actual sample size is reached (pp218。 ineligible。Ch. 7 Selecting samples 1. The need to sample 2. Overview of Sampling techniques 3. Probability sampling 4. Nonprobability sampling Definition of terms ? Census Collect and analyse data from every possible case or group member ? Sampling A range of methods that enable researcher to reduce the amount of data by only data from a subgroup rather than all possible cases or elements ? Population The full set of cases from which a sample is taken Figure Population, sample and individual cases 1. The need to sample ? Budget constraints prevent you from surveying the entire population ? Time constraints prevent you from surveying the entire population ? Impracticable to survey the entire population ? You have collected all the data but need the results quickly 2.
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