waecmaths question:
|
Height |
2 |
3 |
4 |
5 |
6 |
|
Frequency |
2 |
4 |
5 |
3 |
1 |
The table shows the distribution of the height of plants in a nursery. Calculate the mean height of the plants
Option A:
3.8
Option B:
3.0
Option C:
2.8
Option D:
2.3
waecmaths solution:
$\begin{align} & mean=\overline{x}=\frac{\sum fx}{\sum f}=\frac{(2\times 2)+(3\times 4)+(4\times 5)+(5\times 3)+(6\times 1)}{2+4+5+3+1} \\ & \overline{x}=\frac{57}{15}=3.8 \\\end{align}$
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