← Maths syllabus

Northern IrelandMaths

Statistics

4 dot points across 4 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do you find and compare the mean, median, mode and range, including from grouped data?

Find the mean, median, mode and range of a data set, estimate the mean from grouped data, find the modal class, and use averages and range to compare two distributions.
A CCEA GCSE Mathematics answer on averages and spread, covering the mean, median, mode and range, estimating the mean from grouped data, finding the modal class, and comparing two distributions using an average and a measure of spread.
10 min answer →

How do you collect data and represent it in tables, charts and diagrams?

Understand the data-handling cycle, distinguish types of data and sampling, use frequency and two-way tables, and draw and interpret bar charts, pie charts, pictograms, frequency polygons and histograms.
A CCEA GCSE Mathematics answer on collecting and representing data, covering the data-handling cycle, types of data and sampling, frequency and two-way tables, and bar charts pie charts pictograms frequency polygons and histograms.
10 min answer →

How do you use cumulative frequency curves and box plots to find and compare the median, quartiles and spread?

Construct and read cumulative frequency curves, find the median and quartiles, calculate the interquartile range, and draw and compare box plots (Higher tier).
A CCEA GCSE Mathematics Higher answer on cumulative frequency and box plots, covering constructing and reading cumulative frequency curves, finding the median and quartiles, calculating the interquartile range, and drawing and comparing box plots.
11 min answer →

How do you plot a scatter graph, describe correlation, and use a line of best fit?

Plot scatter graphs, describe the type and strength of correlation, draw a line of best fit, use it to estimate values, and understand interpolation, extrapolation and the difference between correlation and causation.
A CCEA GCSE Mathematics answer on scatter graphs and correlation, covering plotting paired data, describing the type and strength of correlation, drawing and using a line of best fit, interpolation and extrapolation, and the difference between correlation and causation.
10 min answer →