Question: Which of the following research questions should be addressed using a two-tailed (as opposed to one-tailed) hypothesis test? SELECT ALL THAT APPLY A factory owner wants to see if a new equipment layout affects productivity. The manager of a large apartment complex wants to determine if charging a higher fee will lead to a decrease in rentals. A professor wants to see if adding interactive activities to each class improves student performance. A marketer wants to assess the effect of targeted ads on consumers' use of social media. The owner of a US sports bar wants to see if showing non-American sports events (e.g., cricket matches, European football games) has an effect on the number of patrons in the bar during the event.