The following four data pairs have been obtained： (1, 5), (2, 6), (4, 9), (5, 11). Without carrying out any calculations, which of the following correlation coefficients best describes the relationship between x and y?
A、-0.98
B、-0.25
C、0.98
D、0.25
A、-0.98
B、-0.25
C、0.98
D、0.25
【参考答案及解析】
From the data given, it is clear that the correlation is positive and strong. The correlation coefficient describing a positive strong relationship is 0.98.
From the data given, it is clear that the correlation is positive and strong. The correlation coefficient describing a positive strong relationship is 0.98.