Validity vs X - What's the difference?
validity | x |
The state of being valid, authentic or genuine.
Having legal force.
A quality of a measurement indicating the degree to which the measure reflects the underlying construct, that is, whether it measures what it purports to measure (see reliability).
The twenty-fourth letter of the .
Image:Latin X.png, Capital and lowercase versions of X , in normal and italic type
Image:Fraktur letter X.png, Uppercase and lowercase X in Fraktur
Roman numerals
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