Question

The correlation coefficient for the ages of drivers in a driver safety class and the number of traffic violations they have received is -0.61
How are the ages and numbers of violations related?

A. as age increases, violation increases
B. as age increases, violations remain the same
C. as age increases, violations decreases
D. There is no association between the two

Answer 1

A correlation coefficient is always a value in between -1 and 1
The closest a coefficient to -1, the correlation is a strong negative correlation
The closest a coefficient to 1, the correlation is a strong positive correlation
The closest a coefficient to 0, there is no correlation at all

The coefficient -0.61 shows a strong negative correlation
This means that the relationship between the age and the violation is an inverse relationship; as age increases, violation decreases

Answer: option C