(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.
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
Correct Answer: Option A
Explanation
(begin{array}{c|c} height(x) & frequency(f) & fx \ hline 2 & 2 & 4\ 3 & 4 & 12\ 4 & 5 & 20 \ 5 & 3 & 15\ 6 & 1 & 6end{array})
mean(bar{x} = frac{sum fx}{sum f})
= (frac{57}{15})
= 3.8