Question: A medical researcher wants to determine whether a drug changes the body's temperature. Seven test subjects are randomly selected and the body temperature of each is measured. The subjects are then given the drug and, after 20 minutes, the body temperature is measured again. The results are listed below. At an alpha level of .05, is there enough evidence to conclude that the drug changes the body's temperature? Assume the body temperatures are normally distributed.

Subject                           1                   2            3               4               5               6            7

Initial                        101.8         98.5      98.1       99.4      98.9      100.2      97.9

Temperature

Second

Temperature            99.2          98.4 98.2 99   98.6 99.7       97.8

1. Identify the claim and state the Null Hypothesis and Alternative Hypothesis.
2. State the level of significance and the degrees of freedom.
3. Find the critical values (points)
4. Calculate d and s _d
5. Find the test statistic.
6. What is your conclusion about the null hypothesis?
7. Does the drug change the body's temperature?

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