Unit 3: Data representation

Module 6: Unit 3 Data representation57 Unit 3: Data representationIntroduction to Unit 3In this unit you will look at different ways to represent data in tables, charts,graphs and diagrams. The emphasis is not on the techniques to produce theserepresentations, but on the question of whether or not the representation bestrepresents the of Unit 3 The aim of this unit is to look at a variety of ways to represent data and tocompare these for the best representation of the data given. The unit willlook at : frequency tables, pictograms, bar charts, line bar charts, histograms,pie charts, line graphs, frequency polygons, stem-leaf plots, scatter the end of this unit you should be able to: organise data describe data read and interpret displays of data construct appropriate displays of data: frequency table, pictogram, barchart, line bar chart, histogram, pie chart, line graph, frequency polygon,stem-leaf plots, scatter plots justify the choice of display used for given data critically anal

Module 6: Unit 3 Data representation59 In a bar graph or bar-line graph the height of the bar or line is proportional to the frequency. Bars are to be drawn separated equally, with same width. The discrete value or category is placed at the centre of the bar.

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