Environment & Ecology · Environmental Science
Consider the following statements regarding the sampling of groundwater nitrate levels: A. The Central Limit Theorem applies regardless of the population distribution for sufficiently large samples. B. Simple random sampling completely eliminates all sampling errors. C. Stratified sampling reduces variance when the individual strata are homogeneous. D. Systematic sampling always ensures absolute randomness. Which of the combination of statements is correct?
- 1B, C and D
- 2A and D only
- 3A and C only✓
- 4A, B and C
Correct answer
A and C only
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