GCSE Secondary Maths Age 13-17 - Probability & Statistics: Stratified sample - Explained

The video tutorial explains the concept of stratified sampling, which involves creating a sample that is proportional to the entire population. The instructor uses a practical example involving age groups in a village to demonstrate how to calculate the number of people in a stratified sample. The process includes determining the total population, calculating the proportion of each group, and adjusting the sample size to ensure it is representative. The tutorial also covers the importance of using whole numbers in sample calculations and concludes with a discussion on marks allocation for understanding the method.

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