Refer to the Air & Space Power Journal (March-April 2014) study of the Joint Strike Fighter (JSF) global defense program, Exercise 11.22. The table below lists the year of initial operation and estimated annual cost (in millions of dollars) for 12 JSF military aircraft models. Find the rank correlation between cost and year of initial operation. Interpret this value, practically.

Transcribed Image Text:

Year Model Cost 1974 1975 1977 1978 1978 1979 F-14 F-15AB A-10 FA-18AB 40 28 13 26 30 F-15CD F-16AB F-16CD FA-18CD F-15E FA-18EF 16 20 29 31 55 1981 1987 1989 1998 2005 2012 F-22 F-35 105 80