A-Level Maths Edexcel
Math
Flashcards for Edexcel A-Level Maths, covering Pure, Statistics and Mechanics.
Sample Data
| Front | What is quota sampling? |
| Back | • For quota sampling, the population is split into strata but these strata are filled by an interviewer/researcher until a certain quota is met for each strata• This type of sampling requires no sampling frame but it is non-random and can therefore introduce bias |
| Front | What does "tr" mean in the large data set? |
| Back | • Trace• Treat this as 0 in calculations |
| Front | What is the formula for P(A∪B)? |
| Back |
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