A pet store is selling a new drug that claims to prevent dogs from having the urge to mark their territory, thus making it less likely for dogs to urinate inside the house. To test the predicted decreased urge to mark territory, the new drug researcher gathered 8 dog volunteers and provided them with the new drug treatment. At the end of the three-week period where the dogs received treatment, each dog owner counted the number of times their dog urinated in the house. In the general dog population, the mean number of times dogs urinate in the house during a 3-week period is = 5. With higher scores indicating the dogs urinated in the house more often. The scores for the 8 dog volunteers are: 12, 4, 3, 0, 2, 0, 2, 1

Is this a one-tailed H_A or a two-tailed H_A?

One-tailed

Two-tailed