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Statistics Symbols - X

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Symbol: X

In regression analysis, it is the explanatory or independent variable.
Formula used:
For example the marks obtained by student depend on the IQ score. Here, IQ score is the independent variable or X.

Symbol: X~ (OR X follows)

It is distribution of X.
Formula used:
The random variable X~ a specific distribution for example, X~Bin (n, p)

Symbol: x̄

It refers to the arithmetic mean or average of X.
Formula used:
For ungrouped data,
For ungrouped data,
Used in:
Measures of Central Tendency.

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