Give a group of data: 56.1, 55.9, 55.9, 56, 55.8, 55.7, 55.6, 56.2. The simplest way to calculate the average is A. Direct calculation B. Calculated by weighted average c. Subtract 56 from each data, average, and add 56 D. Subtract 60 from each data, average, and add 60

Give a group of data: 56.1, 55.9, 55.9, 56, 55.8, 55.7, 55.6, 56.2. The simplest way to calculate the average is A. Direct calculation B. Calculated by weighted average c. Subtract 56 from each data, average, and add 56 D. Subtract 60 from each data, average, and add 60

Method 1: subtract 55 from all data to get 1.1, 0.9, 0.9, 1, 0.8, 0.7, 0.6, 1.2. After calculating the mean value of these numbers, add 55 to the mean value
Method 2: subtract 56 from all data to get 0.1, - 0.1, - 0.1,0, - 0.2, - 0.3, - 0.4,0.2, calculate the mean value, and add 56 to get 55.9
I think the second method is the simplest