A physician wanted to compare two types of pain relief. One is medication and the other is using pressure points. To test whether medication relieves pain faster, they have 10 migraine sufferers compare both types of pain relief and record their observations on a standardized scale. A coin flip was used to determine which type of headache relief each individual would try first. Results indicated that there was no difference in the two types of pain relief. Complete parts (a) through (f) below.

(a) What type of experimental design is this?

(b) What is the response variable in this study?

(c) What is the factor that is set to predetermined levels? What is the treatment?

(d) Identify the experimental units.

(e) Why did the physician use a coin flip to determine which headache relief each individual would try first?

(f) Draw a diagram similar to Figure 7, 8, or 10 to illustrate the design.