A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a period of time, then switch to the other. The responses of the subjects are then compared using matched-pair methods. In an experiment to compare two pain relievers, seven subjects took one pain reliever for two weeks, then switched to the other. They rated their pain level from1to10,with larger numbers representing higher levels of pain. The results are listed below. Can you conclude that the mean pain levelis more with drug B?Let1 represent the mean pain level with drug A and=

d = 1 - 2.Use the = 0.10 level and theP-value method with the table.

Subject

1 2 3 4 5 6 7

Drug A 5 4 6 6 5 2 1

Drug B 7 4 5 6 7 5 7

1. State the appropriate null and alternate hypotheses.
2. Is this a right-tailed, left-tailed, or two-tailed test?
3. Compute the test statistic. Do not round the intermediate steps. Round the answer to two decimal places.
4. Compute the P-value. Use the answer from the last question. Round the answer to four decimal points.
5. Determine whether to reject H0.
6. State a conclusion.