S2 Sampling terminology 0.0 / 5 ? MathematicsStatistics, averages and distributionsA2/A-levelAll boards Created by: Alex2017Created on: 23-04-17 11:21 Population A collection of individual people or items 1 of 13 Finite Population Each individual can be given a number 2 of 13 Infinite Population Each individual cannot be given a number -there are too many 3 of 13 Census An investigation in which information is obtained from all members of a population 4 of 13 Sample A sub-set of the population 5 of 13 Sampling Units Individual units of a population 6 of 13 Sampling Frame A list of all sampling units 7 of 13 Simple Random Sample Every possible sample of a certain size has an equal chance of being selected 8 of 13 Sample Survey An investigation using a sample 9 of 13 Bias Anything which occurs when taking a sample which prevents it from being truly representative of the whole population 10 of 13 Population Parameter Any characteristic of a population which is measurable 11 of 13 A statistic A quantity calculated solely from the observations in a sample (it doesn't involve any unknown parameters) 12 of 13 Sampling Distribution Gives all the values of a statistic and the probability that each would happen by chance alone 13 of 13
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