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A medical researcher wants to determine whether a drug changes the body's temperature. Seven test subjects are randomly selected, and the body temperature (in degrees Fahrenheit) of each is measured. The subjects are then given the drug, and after 20 minutes, the body temperature of each is measured again. The results are listed below.

At α = 0.05, is there enough evidence to conclude that the drug reduces the body's temperature?

| Subject | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---------------------|------|------|------|------|------|------|------|
| Initial Temperature | 103.4| 102.5| 101.1| 103.4| 102.9| 100.2| 100.9|
| Second Temperature | 99.2 | 98.4 | 98.2 | 99 | 98.6 | 99.7 | 97.8 |

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