Section 10.1 Homework

1.  Twenty different statistics students are randomly selected. For each of​ them, their body temperature ​(°​C) is measured and their head circumference​ (cm) is measured. If it is found that r=​0, does that indicate that there is no association between these two​ variables?

Choose the correct answer below.

1. ​No, because while there is no linear​ correlation, there may be a relationship that is not linear.
2. ​No, because r does not measure the strength of the​ relationship, only its direction.
3. ​No, because if r=​0, the variables are in a perfect linear relationship.
4. ​Yes, because if r=​0, the variables are completely unrelated.