JAMB - Mathematics (2001 - No. 44)
The graph shows the cumulative frequency of the distribution of masses of fertilizer for 48 workers in one institution. Which of the following gives the inter-quartile range?
\(\frac{1}{2}(Q_3 - Q_1)\)
Q3 - Q2
Q3 - Q2
Q3 - Q1
Explanation
The interquartile range formula is the first quartile subtracted from the third quartile:
IQR = Q3 – Q1.
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