Question:
Identify the odd answer from the following choice on the basis of kinds of sampling and systems of allocating/distributing/choosing sampling units:
Identify the odd answer from the following choice on the basis of kinds of sampling and systems of allocating/distributing/choosing sampling units:
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Stratified, multistage, and multiphase sampling are standard spatial plot designs used in forest inventories, whereas sequential sampling is an adaptive process used primarily for decision-making and pest counts.
Updated On: Jul 10, 2026
- Stratified sampling
- Multistage sampling
- Multiphase sampling
- Sequential sampling
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Forest inventory and biometrics utilize different statistical sampling designs. These can be categorized based on how sampling plots are spatially arranged and allocated or how sampling size is determined.
Step 2: Detailed Explanation:
- Stratified sampling, Multistage sampling, and Multiphase sampling are all classical spatial design-based sampling systems. They are structured around dividing, allocating, and selecting fixed physical sampling units (plots) across a geographical forest area to estimate timber volume or biomass.
- Sequential sampling is fundamentally different. It is an adaptive sampling method where the total number of samples is not pre-determined. Instead, sampling is conducted sequentially, and the data gathered at each step determines whether to stop sampling (because a statistically significant conclusion has been reached) or to continue. It is typically used in quality control or pest monitoring rather than spatial forest inventory sampling layouts.
Step 3: Final Answer:
Sequential sampling is the odd one out because it is based on sample size determination rather than spatial unit allocation.
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