Value Frecuency
1 7
2 1
3 3
4 2
5 2
Now find the total number of values, we need to sum the frequencies
7 + 1 + 3 + 2 + 2 = 15
Here, there are 15 data
Now, multiple the values by their frequencies
1 x 7 = 7
2 x 1 = 2
3 x 3 = 9
4 x 2 = 2
5 x 2 = 10
Sum the results
7 + 2 + 9 + 2 + 10 = 30
Now divide this number by the total numbers of data
30/15 = 2
then, the mean = 2