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Stratified Random Sample
A method of sampling that involves dividing a population into smaller groups, known as strata, and then randomly selecting samples from each stratum.
Sample Standard Deviation
Sample standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is computed from the square root of the variance of the sample.
Sample Mean
The average value computed from a sample of a population, used as an estimate of the population mean.
Population Mean
The population mean is the average of all the values in a population. It is a measure of central tendency that summarises the characteristic of the entire population.
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