Edexcel GCSE Statistics · 1ST0
Specification 3p.03, 3p.04, 3p.05, 3p.10 · Paper 1, Paper 2
The probability-based prediction of how many times an event will occur, or how many members of a group will have a specified characteristic.
Revise: Calculating expected frequenciesThe predicted count is called the expected frequency. Unlike a probability, which lies between 0 and 1, an expected frequency is a number of outcomes, people or objects.
The number of occurrences predicted in a group using a probability: . It is not a guaranteed count.