A Key Can Be Composed of a Group of Attributes

question 49

True/False

A key can be composed of a group of attributes taken together.

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Definitions:

Variation

Variation refers to the extent to which data points in a data set differ from each other and from the mean of the dataset.

Standard Deviation

A measure that quantifies the amount of variation or dispersion of a set of data values from the mean value.

Standard Deviation

A quantification of the range or diversity in a dataset, illustrating the difference of the numbers from their mean value.

Mean

The average of a set of numbers, calculated by adding them together and dividing by the count of numbers.