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.

% 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 suspecm 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 Caffeine What is the F-value (Fobtained) for the interaction between drug and caffeine (AXB interaction)