Q2. A major Hong Kong catering company, which has three branches respectively in New Territories, Kowloon, and Hong Kong Island, is discussing introducing new menu items. Below is the conversion between CEO and manager from three branches.

Eric, CEO: Hi, Team! Our head office is preparing to introduce our latest menu in your districts, how do you like it? Max, Branch Manager Well...I think it may be better to conduct an experiment to test how the at New Territories: new menu drives revenue of restaurants in three districts. Customers from some districts may not welcome the new menu. Jayson, Branch Manager Yes, I agree with Max. A/B testing can be conducted within each district. at Kowloon: Tak, Branch Manager Exactly! Let's have small trial first and then decide which district will at Hong Kong Island: formally introduce the new menu.Hong Kong Island New Territories Kowloon Month Restaurant Restaurant Restaurant Restaurant Restaurant Restaurant A B A B A B 920 912 3088 2308 932 1432 2 850 849 2689 1839 996 1256 918 911 2887 2206 857 1359\fRevenue Experiment Group (Dependent variable) (Independent variable) 920 850 918 912 849 O 911 Estimate Std. Error P (Intercept) 890.667 21.948 40.58