logo

Cambridge IGCSE Statistics practice

Paper 1 structured question: Quartiles, percentiles and measures of dispersion

Try the question first, then check the answer and practise the same topic again.

Attempt questionQuartiles, percentiles and measures of dispersion revisionRevise the key idea

At a glance

1

Paper

3

Marks

Topic

Quartiles, percentiles and measures of dispersion

Exam-style question

Try this first

Paper 1Statistical Techniques3 marks

A grouped frequency distribution table is provided for the ages of participants in a survey.

Data Table

Grouped Frequency Distribution

The table shows the frequency of ages in intervals for survey participants.

Age IntervalFrequency
10-2015
20-3025
30-4030
40-5020
50-6010
  1. a

    Calculate Estimate the 75th percentile age using linear interpolation.

    Aim for approximately 3 distinct marking points.

    [3]

0 of 1 part answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Related flashcards

Flashcard 1 of 6

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

Choose an answer, get feedback, then move sideways through the set.

0 of 4 attempted

Paper 1 structured question: Quartiles, percentiles and measures of dispersion

Paper 1Statistical Techniques2 marks

Diagram Description

Cumulative Frequency Curve

The cumulative frequency curve shows the distribution of test scores for 100 students.

  1. a

    Calculate Estimate the median score from the cumulative frequency curve.

    Aim for approximately 2 distinct marking points.

    [2]