begin array c c text Class Interval amp Frequen... - JAMB Mathematics 1995 Question
\(\begin{array}{c|c} \text{Class Interval} & Frequency & \text{Class boundaries} & Class Mid-point \ \hline 1.5 - 1.9 & 2 & 1.45 - 1.95 & 1.7\ 2.0 - 2.4 & 21 & 1.95 - 2.45 & 2.2\ 2.5 - 2.9 & 4 & 2.45 - 2.95 & 2.7 \ 3.0 - 2.9 & 15 & 2.95 - 3.45 & 3.2\ 3.5 - 3.9 & 10 & 3.45 - 3.95 & 3.7\ 4.0 - 4.4 & 5 & 3.95 - 4.45 & 4.2\ 4.5 - 4.9 & 3 & 4.45 - 4.95 & 4.7\end{array}\)
The median of the distribution above is
The median of the distribution above is
A
4.0
B
3.4
C
3.2
D
3.0
correct option: b
Median = \(\frac{a + b}{fm}\) (\(\frac{1}{2} \sum f - CF_b\))
= 2.95 + \(\frac{0.5}{15}\)(2.-7)
= 2.95 + \(\frac{0.5}{15}\) x 13
= 2.95 + 0. 43
= 3.38
= 3.4
= 2.95 + \(\frac{0.5}{15}\)(2.-7)
= 2.95 + \(\frac{0.5}{15}\) x 13
= 2.95 + 0. 43
= 3.38
= 3.4
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