The number of flights by U.S. Airlines has grown rapidly. Here are the number of flights flown in each year from 1995 to 2005.
a) Find the correlation of Flights with Year.
b) Make a scatterplot and describe the trend.
c) Note two reasons that the correlation you found in (a) is not a suitable summary of the strength of the association. Can you account for these violations of the conditions?
|
Year
|
Flights
|
|
1995
|
5,327,435
|
|
1996
|
5,351,983
|
|
1997
|
5,411,843
|
|
1998
|
5,384,721
|
|
1999
|
5,527,884
|
|
2000
|
5,683,047
|
|
2001
|
5,967,780
|
|
2002
|
5,271,359
|
|
2003
|
6,488,539
|
|
2004
|
7,129,270
|
|
2005
|
7,140,596
|