S2 Key Words


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  • Created by: Alice
  • Created on: 14-12-11 13:08


Population - A collection of individual items or people.

Sampling frame - A list of all individual members of a populaton.

Sampling Unit - One individual member of the population.

Statistic - A quantity calculated from the observations of a sample with no unknown parameter.

Sampling Distribution - A distribution of all possible values of a statistic and the probability of obtaining it.


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Sample Survey -

  • Cheaper than a census
  • Advantageous when testing items results in their destruction eg. testing the lifetime of a light bulb
  • Data is more readily available
  •  Natural variation generates uncertainty (disadvatage)
  • Can be biased, not truly representative of the population (disdavantage)
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