CIE iGCSE Maths E9.4 Statistical charts and diagrams Exam Style Practice Questions- Paper 2

Question

The number of passengers on a bus is recorded each day for 14 days.
15 18 22 17 35 38 24
19 19 24 25 31 36 29

(a) Complete the stem-and-leaf diagram.

Stem-and-leaf diagram

(b) Find the median.

▶️ Answer/Explanation

Answer:
(a) Completed stem-and-leaf diagram

(b) 24

Explanation: (a) Organize data by tens (stems) and units (leaves). (b) Median is the middle value (7th and 8th terms averaged) in the ordered list: 15,17,18,19,19,22,24,24,25,29,31,35,36,38 → (24+24)/2 = 24.

Question

The box-and-whisker plot shows information about the mass, in kg, of some parcels.

(a) Find the mass of the heaviest parcel.

(b) Find the interquartile range.

▶️ Answer/Explanation

Solution

Ans: (a) 3.3 kg (b) 0.55 kg

(a) The rightmost point on the plot shows the maximum mass = 3.3 kg

(b) IQR = Q3 – Q1 = 2.75 – 2.2 = 0.55 kg (read from the box ends)

CIE iGCSE Maths E9.4 Statistical charts and diagrams Exam Style Practice Questions- Paper 2

CIE iGCSE Maths E9.4 Statistical charts and diagrams Exam Style Practice Questions- Paper 2

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