begin array c c height amp 2 amp 3 amp 4 amp 5 ... - WAEC Mathematics 2014 Question
(\begin{array}{c|c}height & 2 & 3 & 4 & 5 & 6 \ \hline frequency & 2 & 4 & 5 & 3 & 1
\end{array})
The table shows the distribution of the height of plants in a nursery. Calculate the mean height of the plants.
A
3.8
B
3.0
C
2.8
D
2.3
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Correct Option: A
(\begin{array}{c|c} height(x) & frequency(f) & fx \ \hline 2 & 2 & 4\ 3 & 4 & 12\ 4 & 5 & 20 \ 5 & 3 & 15\ 6 & 1 & 6\end{array})
mean(\bar{x} = \frac{\sum fx}{\sum f})
= (\frac{57}{15})
= 3.8
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