WAEC Economics 2014 Paper

Concept:The median is the middle value of a distribution when the data are arranged in order of magnitude.Explanation:From the diagram, the frequencies are: $2$ for value $2$, $5$ for value $3$, $2$ for value $4$, and $1$ for value $5$. Total frequency $= 2+5+2+1 = 10$. Since the total number of observations is even, the median is the average of the $\frac{10}{2} = 5$th and the $6$th values. Write out the observations in ascending order: $2, 2, 3, 3, 3, 3, 3, 4, 4, 5$. The 5th and 6th values are both $3$. Therefore, median $= \frac{3+3}{2} = 3$.Answer:Median $= 3$ Correct option: C.