Identify the data sets as having a positive, a negative, or no correlation.
8. The number of hours a person has driven and the number of miles driven
9. The number of siblings a student has and the grade they have in math class
10. The age of a car and the value of the car
11. The number of weeks a CD has been out and the total sales
12. The number of years a person went to school and their income
13. The number of songs downloaded on your i-pod and the amount of memory available
14. The amount of time spent on the computer instant messaging your friends and the number of computers in your house
15. The age of a house and the number of people living in the house
8. Positive correlation - as the number of hours driven increases, the number of miles driven also increases.
9. No correlation - the number of siblings a student has does not have a direct relationship with their grade in math class.
10. Negative correlation - as the age of a car increases, the value of the car typically decreases.
11. Positive correlation - as the number of weeks a CD has been out increases, the total sales of the CD also typically increase.
12. Positive correlation - generally, the more years a person went to school, the higher their income.
13. Positive correlation - as the number of songs downloaded on an iPod increases, the amount of memory available decreases.
14. No correlation - the amount of time spent on the computer instant messaging friends does not have a direct relationship with the number of computers in your house.
15. No correlation - the age of a house does not have a direct relationship with the number of people living in the house.