***** 课程提问

Using data from twelve European countries, it has been calculated that the correlation between the level of car ownership and the number of road deaths is 0.73. Which of the statements shown follow from this? (i) High levels of car ownership cause high levels of road deaths (ii) There is a strong relationship between the level of car ownership and the number of road deaths (iii) 53% of the variation in the level of road deaths from one country to the next can be explained by the corresponding variation in the level of car ownership (iv) 73% of the variation in the level of road deaths from one country to the next can be explained by the corresponding variation in the level of car ownership
A (i) and (ii) only B (i) and (iii) only C (ii) and (iii) only D (ii) and (iv) only 
老师好,请问为什么选c

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提问时间:2018-10-07 22:59