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StatisticsIntroduction

The Data Detective

Part of Histograms — GCSE Mathematics

This introduction covers The Data Detective within Histograms for GCSE Mathematics. Revise Histograms in Statistics for GCSE Mathematics with 14 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 9 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 1 of 9

Practice

14 questions

Recall

12 flashcards

The Data Detective

A market researcher needs to analyze the ages of customers visiting a shopping center. With hundreds of customers, plotting each individual age would create a messy scatter of points. Instead, they group ages into ranges (0-10, 10-20, 20-30, etc.) and create a histogram - a powerful visual tool that reveals the shape and distribution of their data at a glance.

Keep building this topic

Read this section alongside the surrounding pages in Histograms. That gives you the full topic sequence instead of a single isolated revision point.

Key Facts About HistogramsHistogram AnatomyUnderstanding Frequency Density

Practice Questions for Histograms

A histogram shows the heights (cm) of plants in a garden with the following frequency densities: - 0 =< h < 5: frequency density = 4 - 5 =< h < 15: frequency density = 3 - 15 =< h < 25: frequency density = 6 - 25 =< h < 40: frequency density = 2 What is the modal class?

  • A. 0 =< h < 5
  • B. 5 =< h < 15
  • C. 15 =< h < 25
  • D. 25 =< h < 40
1 markstandard

A histogram is drawn with unequal class widths. A student says: 'I can just use frequency on the y-axis instead of frequency density — the shape of the histogram will look the same.' Is the student correct? Explain your answer.

2 marksstandard

Quick Recall Flashcards

What is a histogram?
A histogram is a statistical diagram used to display grouped continuous data. Key features: - Bars touch (no gaps) - y-axis shows frequency density - Area of each bar = frequency for that class
What is the modal class in a histogram?
The modal class is the class interval with the highest frequency density. It is the class represented by the tallest bar on the histogram. Note: If class widths are equal, the modal class also has the highest frequency.

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Key Facts About Histograms