QUESTION 7
Use the following table relating the the population in millions and median age for a variety of American cities.
New
Philadelphia Phoenix
Los
Angeles York
3.849 8.214
31.6 34.2
City
Population
(millions)
Median Age
Chicago Dallas
2.833 1.233
31.5 30.5
Houston
2.144
30.9
1.448
34.2
1.513
30.7
San
Antonio
1.297
31.7
San
Diego
1.257 0.930
32.5 32.6
San
Jose
Find and interpret the correlation coefficient.
The correlation coefficient is 0.2722. This means that there is a very weak positive correlation between population and median age.
The correlation coefficient is 0.2722. This means that 27.22% of the variation in the median age can be explained by the population of the given city.
The correlation coefficient is 0.2040. This means that there is a very weak positive correlation between population and median age.
The correlation coefficient is 0.2040. This means that 20.4% of the variation in the median age can be explained by the population of the given city.
The correlation coefficient is 0.4517. This means that there is a weak positive correlation between population and median age.
The correlation coefficient is 0.4517. This means that 45.17% of the variation in the median age can be explained by the population of the given city.