Answer:
7.55
Explanation:
An arithmetic mean is the average value of all the data points.
In order to find the average value, you add all the data points then divide the resulting sum by the number of data points there are.
The sum of all data points:
3 + 9 + 10 + 5 + 8 + 5 + 9 + 11 + 10 + 3 + 10 =
83
The number of data points:
3, 9, 10, 5, 8, 5, 9, 11, 10, 3, 10
1,2,3,4,5,6,7,8,9,10, 11 = 11 data points
Average value/ Mean:
83 / 11 = 7.545454545454 = rounded to 7.55