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Shellfish are divided into mollusks and crustaceas.
Standard Normal Distribution
A probability distribution that has a mean of zero and a standard deviation of one, also represented by the standard normal curve.
Z-score
A measure that describes a value's relationship to the mean of a group of values, represented in units of standard deviation.
Third Quartile
The value that divides the top 25% of a data set from the bottom 75%, often used as a measure of data spread.
Quartile
A type of quantile which divides the range of a probability distribution into four intervals of equal probability, used in describing the spread of a dataset.
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