Examlex
A population of scores is normally distributed with a mean of 100 and a standard deviation of 20. Approximately percent of the scores fall in the interval between 100 and 140.
Random Sample
A sample drawn from a population in such a way that every individual has an equal chance of being selected.
Quality Control
The process of ensuring that products and services meet customer expectations and compliance standards through consistent monitoring and regulation.
Standard Error
The standard deviation of the sampling distribution of a statistic, most commonly the mean.
Confidence Interval
A set of values based on sample statistics, expected to include an unknown population parameter.
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