A traffic safety officer conducted an experiment to determine whether there is a correlation between people's ages and driving speeds. Six individuals were randomly sampled and the following data were collected. The value of Pearson r equals _________.
A) - 0.82
B) - 0.70
C) - 0.63
D) +0.70

Question

A traffic safety officer conducted an experiment to determine whether there is a correlation between people's ages and driving speeds. Six individuals were randomly sampled and the following data were collected.  The value of Pearson r equals _________.
A) - 0.82 
B) - 0.70 
C) - 0.63 
D) +0.70

Quizplus · Accepted Answer

After calculating the correlation coefficient using the given data, we get Pearson r = -0.70, which is closest to option B). A negative value of r indicates that there is a negative correlation between age and driving speed, meaning that as age increases, driving speed tends to decrease.

A Traffic Safety Officer Conducted an Experiment to Determine Whether