Chapter 6, Problem 35E

Correlation conclusions I The correlation between Age and Income as measured on 100 people is r = 0.75. Explain whether or not each of these possible conclusions is justified:

1. a) When Age increases, Income increases as well.
2. b) The form of the relationship between Age and Income is straight.
3. c) There are no outliers in the scatterplot of Income vs. Age.
4. d) Whether we measure Age in years or months, the correlation will still be 0.75.