1. According to a fast food manager, the average number of customers between 8am to 11am is 10, with a variance of two. His friend from other outlet does not believe that the variance is two. He counts the number of customers in 15 other outlets and obtained the following data: Table 1 Outlet Number of Customers 11 10 9 10 10 14 10 15 11 Based on the data, help the manager to decide whether the variance is different from two using a = 0.05. ( Total / Jumlah: 20 )