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?
Attached Figure / Diagram
A
\(\frac{1}{2}(Q_3 - Q_1)\)
B
Q3 - Q2
C
Q3 - Q2
D
Q3 - Q1
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
The interquartile range formula is the first quartile subtracted from the third quartile:
IQR = Q3 – Q1.
Source: Myschool Past Questions Archive (Record #33099)