Many public interest groups assert that the federal government expends an increasing portion of the nation’s resources on the nation’s defense. The following table contains the outlays (in billions of dollars) for the Defense Department since 1980 and the outlays as a percentage of gross national product (% GNP).
Year | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 |
Outlay | 134 | 158 | 185 | 210 | 227 | 253 | 273 | 282 | 290 | 304 | 299 | 273 | 298 | 291 | 282 | 272 | 266 | 267 |
% GNP | 4.9 | 5.2 | 5.8 | 6.1 | 6.0 | 6.2 | 6.2 | 6.1 | 5.9 | 5.7 | 5.3 | 4.7 | 4.9 | 4.5 | 4.1 | 3.8 | 3.6 | 3.4 |
a. Plot the outlay time series data and describe any trends in the outlays.
b. Plot the % GNP time series data and describe any trends in the % GNP.
c. Do the two time series have similar trends? Do either of the plots support the public interest group’s contention?
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