In the data set 4, 5, 6, 9, 9, 9, what is the mean?

In the data set 4, 5, 6, 9, 9, 9, what is the mean?

• A. 4
• B. 5
• C. 7
• D. 9

Answer: (C)

Mean is the average value, found by adding all the numbers and dividing by how many numbers there are. For this set, the sum is 4 + 5 + 6 + 9 + 9 + 9 = 42, and there are 6 numbers. 42 ÷ 6 = 7. So the mean is 7. This shows the overall level of the data by incorporating every observation, balancing the lower values with the higher ones.

Mean is the average value, found by adding all the numbers and dividing by how many numbers there are. For this set, the sum is 4 + 5 + 6 + 9 + 9 + 9 = 42, and there are 6 numbers. 42 ÷ 6 = 7. So the mean is 7. This shows the overall level of the data by incorporating every observation, balancing the lower values with the higher ones.