Question

Following are the weights (in kg) of 10 new born babies in a hospital on a particular day:
3.4, 3.6, 4.2, 4.5, 3.9, 4.1, 3.8, 4.5, 4.4, 3.6. Find the mean $\overline{X}$.

Answer 1

We have:
$$\begin{gathered} \overline{X}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{the}\mathrm{observations}}{\mathrm{Number}\mathrm{of}\mathrm{observations}} \\ \Rightarrow \overline{X}=\frac{3.4+3.6+4.2+4.5+3.9+4.1+3.8+4.5+4.4+3.6}{10} \\ \Rightarrow \overline{X}=\frac{40}{10}=4\mathrm{kg}. \end{gathered}$$