A researcher at a pharmaceutical company is interested in testing out the effects of a new drug, which he thinks will improve attention. However, he also suspects that the effects of the drug interact with caffeine. To test this, he tests six separate groups (n = 10, in each group), given either a drug, a placebo, or no drug, and either having consumed caffeine, or no caffeine. Each performs an attention task. He collects the following data.

drug	placebo	no drug
Caffeine	x= 5	x= 10	x= 15
x2= 210	x2= 330	x2= 415
No Caffeine	x= 20	x= 10	x= 6
x2= 780	x2= 345	x2= 270

What is the F-value (F-obtained)for theinteractionbetween drug and caffeine (AxB interaction)