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Click on the horizontal axis to select points for a frequency distribution. The frequency distribution is given in the first table, and the corresponding histogram is shown in the graph box. The class width (and hence the number of classes) can be varied with the scroll bar. The vertical axis can be selected as either frequency or relative frequency from the list box. Different sets of summary statistics can be selected from a list box:
* Mean and standard deviation
* Boxplot
* Mean, median and mode
* Median and mean absolute deviation

Software/Applets used on this page

PSOL
an applet from PSOL from UAH

Glossary

axis

One of two straight lines on a graph from which measurements are taken. One axis (the y axis) is vertical; the other (the x axis) is horizontal.

frequency

Of a function: the rate of repetition of a periodic function.
In statistics: the number of occurances of a value

graph

A diagram showing a relationship between two variables.
The diagram shows a vertical y axis and a horizontal x axis.

histogram

A statistical diagram for continuous data similar to a bar chart but where the area of each bar is proportional to the frequency.

mean

the sum of all the members of the list divided by the number of items in the list.

median

the middle value of a set of data that has been arranged in order of magnitude; half the data values are above it and half are below.

mode

the value in a set of discrete data that occurs most frequently

standard deviation

The square root of the variance; a measure of dispersion.

Full Glossary List

This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA A-Level (UK - Pre-2017)S1Summarising dataRepresentation-
AQA AS Maths 2017StatisticsData Presentation and InterpretationFurther Charts-
AQA AS/A2 Maths 2017StatisticsData Presentation and InterpretationFurther Charts-
CCEA A-Level (NI)S1Summarising dataRepresentation-
CIE A-Level (UK)S1Summarising dataRepresentation-
Edexcel A-Level (UK - Pre-2017)S1Summarising dataRepresentation-
Edexcel AS Maths 2017StatisticsData Presentation and InterpretationFurther Charts-
Edexcel AS/A2 Maths 2017StatisticsData Presentation and InterpretationFurther Charts-
I.B. Higher Level5Summarising dataRepresentation-
I.B. Standard Level5Summarising dataRepresentation-
Methods (UK)M14Summarising dataRepresentation-
I.B. (MSSL)6Summarising dataRepresentation-
OCR A-Level (UK - Pre-2017)S1Summarising dataRepresentation-
OCR AS Maths 2017StatisticsWorking with DataFurther Charts-
OCR MEI AS Maths 2017StatisticsWorking with DataFurther Charts-
OCR-MEI A-Level (UK - Pre-2017)S1Summarising dataRepresentation-
Pre-U A-Level (UK)ProbSummarising dataRepresentation-
Scottish (Highers + Advanced)HSSummarising dataRepresentation-
Scottish HighersSSummarising dataRepresentation-
Universal (all site questions)SSummarising dataRepresentation-
WJEC A-Level (Wales)S1Summarising dataRepresentation-