Headache Treatments Narrative The Following Data Were Generated from a 2 * 2

Essay

Headache Treatments Narrative
The following data were generated from a 2 * 2 factorial experiment with three replicates, where factor A levels represent two different injection procedures of an anesthetic to the occipital nerve (located in the back of the neck), and factor B levels represent two different drugs that physicians recommend to increase the effectiveness of the injections. Three headache patients were randomly selected for each combination of injection and drug.
Factor B
-Refer to Headache Treatments Narrative. Test at the 5% significance level to determine if differences exist among the four treatment means.