题目内容
Using data from 20 big cities in China, it has been calculated that the correlation between the level of car ownership and the number of road death is 0.80. Which of the statements shown follow from this?i. There is a strong relationship between the level of car ownership and the number of road deathsii. High levels of car ownership cause high levels of road deathsiii. 80% of the variation in the level of road deaths from one city to the next can be explained by the corresponding variation in the level of car ownershipiv. 64% of the variation in the level of road deaths from one city to the next can be explained by the corresponding variation in the level of car ownership
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