Question

Which of the following is the mean of a set of observations?

• A. The most common datum in a data set
• B. The most important datum in a data set
• C. Sum of the values of all the observations divided by the total number of observations
• D. Sum of the values of all the observations divided by twice the total number of observations

Answer 1

The correct option is C

Sum of the values of all the observations divided by the total number of observations

Let us consider a data set consisting of terms $x_1,x_2,x_3,x_4,x_5$. The mean of these terms is $\frac{x_1+x_2+x_3+x_4+x_5}{5}$. This is nothing but the sum of the values of all the observations divided by the total number of observations.