normal distribution
- Guideline or reference source
- UNODC Glossary of terms for quality assurance and good laboratory practice
- Definition
- Purely theoretical continuous probability distribution in which the horizontal axis represents all possible values of a variable and the vertical axis represents the probability of those values occurring. The scores on the variable are clustered around the mean in a symmetrical, unimodal pattern known as the bell-shaped curve or normal curve. In a normal distribution, the mean, median, and mode are all the same. The normal distribution is obtained when the number of events in the binomial distribution, n, becomes very large, tending to infinite.
- Broader Term
- theoretical probability distribution
- Related Term
- parametric test
- z-distribution
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