Formulae: Unit 3 0.0 / 5 ? MathematicsData HandlingGCSEEdexcel Created by: annanolanCreated on: 03-12-16 09:07 How do you draw a frequency polygon? Join the midpoints of the tops of the bars in a frequency diagram with straight lines 1 of 5 What is a time series graph? A line graph with time plotted on the horizontal axis 2 of 5 What is bivariate data? two variables which can be plotted on a scatter graph to show whether there is a relationship 3 of 5 If the total frequency in a grouped frequency table is n, what is the median? The median lies in the class containing the n+1/2 th item of data 4 of 5 How do you find a 3 point moving average? Find the mean of the first 3 (terms 1, 2 and 3), then the mean of the second 3 (terms 2,3 and 4), then the 3rd three etc. and plot them on the graph 5 of 5
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