Stratified sampling, Layers to represent all subgroups, Stratified advantage, More precise for specific groups, Stratified disadvantage, Planning is complex and time-consuming, Systematic sampling, Collecting data at regular intervals, Systematic advantage, Even spread across population, Systematic disadvantage, May miss important variations, Random sampling, Collect data using chance selection, Random advantage, Reduces bias and is fair, Random disadvantage, May miss key subgroups, CBD stratified survey, Residents tourists and business owners, Neighbourhood stratified comparison, High-income and low-income areas, Shopping centre systematic survey, Every 3rd customer in a store, Environmental quality survey systematic, Every second street do an EQS, Beach sediment systematic sampling, Every 5 metres pick measure pebble size, Vegetation stratified survey, Forest edge, middle and clearing, Soil random sampling, Random points in a field to test the soil

Sampling methods and examples

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Match science tools
Match science tools
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匹配游戏
Soil Matching
Soil Matching
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寻找匹配项
Sample vs Population Practice (or neither)
Sample vs Population Practice (or neither)
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打地鼠
Statistical vs. Non-Statistical Questions
Statistical vs. Non-Statistical Questions
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按组分配
sorting materials into groups
sorting materials into groups
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随堂测验
Sampling, Observation or Experimental Design?
Sampling, Observation or Experimental Design?
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寻找匹配项
math samples
math samples
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随堂测验
RANDOM SAMPLING
RANDOM SAMPLING
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排序练习
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