Summary
Contents
The author focuses especially on weaknesses in numeracy often observed in adults, and in teacher-trainees in particular.
Check-up 57: Understanding Cumulative Frequency Graphs
Check-up 57: Understanding Cumulative Frequency Graphs
The diagram is a cumulative frequency graph showing data about the average points score achieved by 160 grammar schools in England in GCSE/GNVQ examinations one year. It passes through the point (58, 40), marked with a circle. What information does this point on the graph provide?
Discussion and Explanation of Check-up 57
Cumulative frequency is ‘the frequency so far’. To read off from the graph that the cumulative frequency for an average points score of 56 is 20 means that the total number of schools with points scores up to and including that value is 20.
Imagine that we ...