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Chapter 6

Statistics

Measuring spread with range, IQR, variance and standard deviation; cumulative frequency tables and the ogive; and scatter diagrams and the correlation coefficient.

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6.1 Measure of Variation

Range and Interquartile RangeMedium
Variance and Standard DeviationHard

6.2 Cumulative Frequency

Cumulative Frequency Tables and the OgiveMedium
Reading the Median and Quartiles from an OgiveMedium

6.3 Correlation

Scatter Diagrams and CorrelationMedium
The Correlation CoefficientHard

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