14 Match the linear correlation coefficient to the scatter d

14. Match the linear correlation coefficient to the scatter diagram. The scales on the x- and y-axes are the same for each diagram.

(a) r = 0.969

(b) r = 0.049

(c) r = 1

(d) r = 0.992

24. For the 41 nations that participated in TIMMS, the correlation between the percentage of students who skipped class at least once in the past month and the mean score on the exam was 0.52. Does this suggest there is a linear relation between attendance and achievement score? Write a sentence that explains what this result might mean.

Solution

24)

the correlation between the percentage of students who skipped class at least once in the past month and the mean score on the exam was 0.52 means that there is a relationship but this is negative