Edexcel A-Level Mathematics AS S1.2.1 Histograms Stem and Leaf Questions

Practise histograms, stem-and-leaf diagrams and box plots by calculating frequency density, reading quartiles and medians, comparing spread and skew, and identifying outliers.

Exam points

Use class width and frequency density to calculate histogram bar heights, areas or frequencies.
Read quartiles, medians or 75% thresholds from box plots and stem-and-leaf displays.
Compare distributions using centre, spread, skewness or outliers shown on the diagram.

[Maximum number: 3]

The histogram shows the times taken, in seconds, by each of 260 people to complete a puzzle.

Figure for Question Edexcel A-Level Mathematics AS S1.2.1 Histograms Stem and Leaf Questions question 1 — Edexcel A-Level Mathematics AS

Use the histogram to complete the frequency table for the times taken to complete the puzzle.

Table for Question Edexcel A-Level Mathematics AS S1.2.1 Histograms Stem and Leaf Questions question 1 — Edexcel A-Level Mathematics AS

Given that $\sum \mathrm{f} t=11087.5$ and $\sum \mathrm{f} t^{2}=505718.75$

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Edexcel A-Level Mathematics AS S1.2.1 Histograms Stem and Leaf Questions question 1