The mean for the data $$6, 7, 10, 12, 13, 4, 8 ,12$$ is:
Correct option is A. $$9$$
We have,
$$x_i=6,7,10,12,13,4,8,12$$
$$\therefore \text{Mean} =\dfrac{\text{Sum of all the observations}}{\text{Total number of observations}}$$
$$=\dfrac{6+7+10+12+13+4+8+12}{8}$$
$$=\dfrac{72}{8}=9$$