フリー問題

問題文

An online course provider observes that learners who post in the discussion forum finish with higher assessment scores. The correlation coefficient between number of posts and score is 0.61. A manager proposes to make posting mandatory so that scores will rise. Which of the following statements is correct?

選択肢

1. The coefficient of 0.61 shows a positive association, so the manager is relying on an assumption the data cannot support.
2. The coefficient of 0.61 shows a demonstrated causation, so the manager is relying on an assumption the data cannot support.
3. The coefficient of 0.61 shows a demonstrated causation, so the manager is relying on an inference the data already supports.
4. The coefficient of 0.61 shows a positive association, so the manager is relying on an inference the data already supports.