Home / CIE iGCSE Maths C9.5 Scatter diagrams Exam Style Practice Questions- Paper 1

CIE iGCSE Maths C9.5 Scatter diagrams Exam Style Practice Questions- Paper 1

CIE iGCSE Maths C9.5 Scatter diagrams Exam Style Practice Questions- Paper 1

IGCSE Mathematics(0580) Practice Questions Paper 1 - All Chapters
Question

For each of 10 people working in an office, the scatter diagram shows their salary and the value of their car.

(a) One of these people has a salary of $28,000. Find the value of their car.

(b) Another person starts to work in the office. Their salary is $54,000 and the value of their car is $6,100. Plot this information on the scatter diagram.

(c) What type of correlation is shown in the scatter diagram?

▶️ Answer/Explanation
Solution

Ans:

(a) $4,800 (estimated from the scatter plot)

(b) Point should be plotted at (54,000, 6,100)

(c) Positive correlation (as salary increases, car value tends to increase)

Question

The stem-and-leaf diagram shows the time, in minutes, it takes each of 15 people to complete a race.

Find

(a) the mode

(b) the range

(c) the median.

▶️ Answer/Explanation
Solution

(a) Ans: 27

The mode is the most frequent value. From the stem-and-leaf plot, the number 27 appears twice, while all others appear once.

(b) Ans: 15

The range is the difference between the maximum (34) and minimum (19) values. Thus, 34 – 19 = 15.

(c) Ans: 25

For the median, arrange all 15 values in order. The 8th value is 25, which is the middle value.

More IGCSE Mathematics Practice Questions Paper 1 ..........
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