Sampling & Data Collection (Edexcel A-Level Mathematics): Flashcards

Non-numerical data

Numerical data

Numerical data that can take infinite values

Data that can only take certain countable values

Descriptive data with non-numeric variables

Entire set of objects from which we can draw a sample

A subset of the population

A sample the same size as the population

A sample that does not represent the population

Each member has equal chance of being chosen

Each subcategory proportionally represented in sample

Applying a rule to population to generate sample

Ask first people you see until you have enough data

Use opportunity sampling to fill subcategory quotas

Choose a cluster of people from population, ask them all