Go to content
You must know how to calculate the standard deviation from given summary data using the formula: \displaystyle \sqrt{\frac{\sum x^2}{n} - \bar{x}^2}
Change
 Steps  
All
Change
 Steps  
All
O
O
O
O
    
+
r
-
    

Software/Applets used on this page

jsMath
This page uses jsMath
You can get a better display of the maths by downloading special TeX fonts from jsMath. In the meantime, we will do the best we can with the fonts you have, but it may not be pretty and some equations may not be rendered correctly.

Glossary

standard deviation

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

union

The union of two sets A and B is the set containing all the elements of A and B.

Full Glossary List

This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA A-Level (UK - Pre-2017)S1Summarising dataMeasures of dispersion-
CCEA A-Level (NI)S1Summarising dataMeasures of dispersion-
CIE A-Level (UK)S1Summarising dataMeasures of dispersion-
Edexcel A-Level (UK - Pre-2017)S1Summarising dataMeasures of dispersion-
I.B. Higher Level5Summarising dataMeasures of dispersion-
I.B. (MSSL)6Summarising dataMeasures of dispersion-
I.B. Standard Level5Summarising dataMeasures of dispersion-
Methods (UK)M14Summarising dataMeasures of dispersion-
OCR A-Level (UK - Pre-2017)S1Summarising dataMeasures of dispersion-
Pre-U A-Level (UK)ProbSummarising dataMeasures of dispersion-
Scottish HighersSSummarising dataMeasures of dispersion-
Scottish (Highers + Advanced)HSSummarising dataMeasures of dispersion-
WJEC A-Level (Wales)S1Summarising dataMeasures of dispersion-
Universal (all site questions)SSummarising dataMeasures of dispersion-
CBSE XI (India)Statistics and ProbabilityStatisticsRange, mean deviation, variance and standard deviation of grouped data-
Edexcel AS/A2 Maths 2017StatisticsMeasures of DataMeasures of Variation-
Edexcel AS Maths 2017StatisticsMeasures of DataMeasures of Variation-
AQA AS Maths 2017StatisticsData Presentation and InterpretationMeasures of Variation-
OCR AS Maths 2017StatisticsCentral Tendency and VariationMeasures of Variation-
OCR MEI AS Maths 2017StatisticsCentral Tendency and VariationMeasures of Variation-
AQA AS/A2 Maths 2017StatisticsData Presentation and InterpretationMeasures of Variation-