JAMB - Mathematics (1984 - No. 30)
The cumulative frequency function of the data below is given below by the equation y = cf(x). What is cf(5)?
\(\begin{array}{c|c} Score(n) & Frequency(f)\\\hline 3 & 30\\ 4 & 32\\ 5 & 30\\ 6 & 35\\8 & 20 \end{array}\)
\(\begin{array}{c|c} Score(n) & Frequency(f)\\\hline 3 & 30\\ 4 & 32\\ 5 & 30\\ 6 & 35\\8 & 20 \end{array}\)
30
32
55
62
92
Explicació
If y = cf(x)
cf(5) = 30 + 32 + 30
= 92
cf(5) = 30 + 32 + 30
= 92