Frequency tables, charts and scatter diagrams
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The teaching part (1 min) is free to watch. A free account opens the whole lecture: 6 practice questions, 1 real past-paper question with the answer explained, the mistakes that lose marks, the full-marks tip, a one-card summary and a quick quiz.
What this lecture covers
- Turning data into a picture
- Types of data
Read the transcript of the teaching part
Last time
Before we start: last time, in Tree diagrams, conditional probability and Venn probability, you learned these points. Here they are again on one card. Keep them in mind, because today builds on them.
Turning data into a picture
A survey asks sixty students for their favourite sport. A list of sixty answers tells you nothing at a glance. A table, a chart or a graph can show the pattern in seconds. Today you meet the main ways to organise and display data, and how to read the story they tell.
Types of data
Categorical data is words or categories, like favourite sport. Numerical data is numbers, like height or number of siblings. Discrete data takes separate values you can count: shoes sizes, goals scored. Continuous data can take any value in a range: time, mass, length. A quick test: could there be a value in between? If yes, it is continuous.
How often it comes up
How often Cambridge has asked each part, counted by ExamYard from every past paper in its question bank: Pie charts · Scatter diagrams and correlation.
The whole chapter: Statistical Diagrams.
Chapter 30: Statistics
- Frequency tables, charts and scatter diagrams 6 min
Also for O Level Maths 4024
Which topics come up most in O Level Maths 4024 past papers, counted from every paper since 2004.