Data presentation, summary measures and bivariate interpretation

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Construct and interpret statistical diagrams and tables including bar charts, pie charts, histograms, cumulative frequency graphs, box plots, scatter diagrams and time series graphs, using density where appropriate.
Calculate and interpret measures of central tendency and spread, including mean, median, mode, quartiles, interquartile range, range, variance and standard deviation for raw and grouped data where required.

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Compare distributions using shape, centre and spread, and comment on skewness and the effect of outliers.

Interpret scatter diagrams and calculate and interpret the product moment correlation coefficient as a measure of linear association.

Interpret correlation carefully, distinguishing association from causation and recognising the effect of unusual points or non-linear relationships.

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