The table for part a shows approximate distances between selected
The table for part a shows approximate distances between selected cities and the approximate cost of flights between those cities in November 2009.
a. Calculate the correlation of the numbers shown in the part a table by using a computer or statistical calculator.
Cost Miles
180 ....... 960
400 ....... 3100
270 ....... 2000
100 ....... 430
443 ....... 3000
b. The table for part b shows the same information, except that the distance was converted to kilometers by multiplying the number of miles by 1.609. What happens to the correlation when numbers are multiplied by a constant?
Cost Kilometers
180 ....... 1545
400 ....... 4988
270....... 3218
100....... 692
443....... 4827
c. Suppose the Federal Aviation Administration (FAA) adds a tax to each flight. Fifty dollars is added to every flight, no matter how long it is
The table for part c shows the new data. What happens to the correlation when a constant is added to each number?
Cost Miles
230 ....... 960
450 ....... 3100
320 ....... 2000
150 ....... 430
493 ....... 3000
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