The mean of $n$ observations $x_1, x_2, \ldots, x_n$ is:
A$\sqrt{\sum x_i}$
B$\sum x_i$
C$\dfrac{n}{\sum x_i}$
D$\dfrac{1}{n} \sum x_i$
Answer & Solution
Correct answer: D. $\dfrac{1}{n} \sum x_i$
Mean $\bar{x} = \dfrac{1}{n} \sum_{i=1}^{n} x_i$.
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