Displaying Statistics  
Summary 
graphs, such as pictographs, column graphs and pie graphs can be drawn to illustrate statistical data. the frequency is the number of times each score, event or measurement occurs. frequencies are shown in a table in which information or data is arranged in order. from frequency tables, bar graphs and histograms can be drawn. a time series graph is a line graph of repeated measurements taken over regular time intervals. time series graphs help to show trends or patterns. 
Key Skills 

Vocabulary  data, pictographs, column graph, pie chart, sector graph, bar graph, frequency, ungrouped data, grouped data, histogram, time series, trend. 