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Why is sampling often used instead of a census?
A
Sampling is usually quicker and cheaper.
B
Randomly select clusters, then study all or sampled members within them.
C
For systematic sampling, the approximate interval is k=Nnk=\frac{N}{n}k=nN, and the starting position is chosen randomly from 1 to kkk.
D
The interval may repeatedly select the same part of a pattern.
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2.1.4 Variety of sampling techniques Flashcards
23 flashcards on OCR (MEI) A Level Maths 2.1.4 Variety of sampling techniques: the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.