Answer: 7.286
Step-by-step explanation: To find the average, here is the formula =
Sum of all values in a data set ÷ the number of values = mean (average)
Step 1: We add the sum of the values
We do=
9 + 3 + 10 + 5 + 8 + 8 + 8 = 51
Step 2: We find the number of values
9 3 10 5 8 8 8
1 2 3 4 5 6 7
So there are 7 values.
Step 3: We divide the sum of values by the number of values
51 ÷ 7 = 7.286
So the answer is 7.285714....
We round it to the nearest 3 decimal places (3 d.p).
This becomes 7.286