(a)[3]
Find the interquartile range.
(b)[3]
Two packets are chosen at random. Find the probability that one packet has a mass greater than $50$ g while the other packet has a mass less than $50$ g.
Mathematics 0580 · IGCSE · Averages and measures of spread
Averages and measures of spread — practice question
The stem-and-leaf diagram gives the mass of each of 13 packets. The stems are 3, 4 and 5, and the leaves are: for 3, 1, 2, 8; for 4, 0, 1, 2, 3, 3, 8; for 5, 1, 2, 3, 4. Key: $3|1$ stands for $31$ g.