Answer:
3.25
Explanation:
To find the arithmetic mean of a set of data, you add up all of the values in the set and then divide by the total number of values.
In this case, the set of data is {6, 1, 5, 1} and the total number of values is 4.
To find the arithmetic mean, we add up all the values:
6 + 1 + 5 + 1 = 13
then divide by the total number of values:
13 / 4 = 3.25
So the arithmetic mean of the set of data {6, 1, 5, 1} is 3.25.