Question

The weights of an angle for three different observations are $W_1,W_{2}and{W}_3$ respectively. The weight of the weighted arithmetic mean is:

• A. $W_1+W_2+W_3$
• B. $\frac{1}{\frac{1}{W_1}+\frac{1}{W_2}+\frac{1}{W_3}}$
• C. $\frac{1}{W_1}+\frac{1}{W_2}+\frac{1}{W_3}$
• D. $\frac{W_1+W_2+W_3}{3}$

Answer 1

The correct option is A $W_1+W_2+W_3$

The weight of the weighted arithmetic mean is equal to the sum of the individual weights