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Soru

Zorluk: OrtaCorrelation vs. Causation

Agricultural economists have tracked farming practices across various regions for the past decade. They discovered a strong statistical correlation: regions that most rapidly adopted new drought-resistant crop varieties also experienced the most significant declines in overall soil nutrient levels. The economists concluded that the cultivation of these newly developed drought-resistant crops actively depletes soil nutrients at a much faster rate than the cultivation of traditional crops.

Which of the following statements, if true, provide a valid alternative explanation for the observed correlation? Select all that apply.

  1. Severe, prolonged droughts prompted the shift to the new crops in these regions, and these droughts independently cause rapid soil nutrient degradation.Cevap
  2. The drought-resistant crop varieties were primarily subsidized and distributed to regions that were already suffering from rapidly deteriorating soil conditions.Cevap
  3. C
    The overall agricultural output in regions using drought-resistant crops has remained largely stable despite the noted decline in soil nutrients.
  4. D
    The percentage of farmers adopting drought-resistant crops is smaller than the absolute number of farmers who reported some level of nutrient depletion.
  5. E
    Regions that completely rejected the new varieties and continued planting only traditional crops maintained perfectly stable soil nutrient levels over the past decade.

Cevap

The correct statements are the one identifying droughts as a common cause for both factors, and the one identifying pre-existing poor soil as the reason for distributing the crops to those regions.
The correct options both successfully provide alternative reasons for why drought-resistant crops and soil nutrient depletion are found together. One introduces a third variable (prolonged droughts cause both the adoption of the crops and the soil degradation). The other introduces a reverse causal relationship (the crops were brought to areas because the soil was already degrading). Both successfully sever the economists' assumed causal link.

Adım Adım Çözüm

1
Analyze the argument's structure to identify the premises and the conclusion.
Premise: There is a correlation between planting drought-resistant crops and declining soil nutrients. Conclusion: Planting these crops causes the decline in soil nutrients.
Understanding the gap between the premise (correlation) and conclusion (causation) is essential for finding alternative explanations.
2
Identify the logical flaw in the argument.
The argument assumes causation based solely on a correlation, ignoring the possibilities of a third variable causing both phenomena or a reverse causal relationship.
Identifying the specific causal flaw allows us to anticipate what a valid alternative explanation will look like.
3
Evaluate each option to see if it provides a logical alternative explanation for the correlation.
The option about prolonged droughts provides a third variable (droughts cause both the crop adoption and the soil degradation). The option about subsidized distribution provides a reverse causality scenario (poor soil led to the crops being planted). Both successfully explain the correlation without accepting the economists' conclusion.
The question asks to select all statements that provide a valid alternative explanation.

Anahtar Kavram

Alternative Causal Explanations (Third Variable and Reverse Causality)
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Konular

Correlation vs. Causation

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