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Conversion Factor  -  A clever way of writing 1 as a fraction in which the numerator is equal to the denominator but the numerator and the denominator have different units. For example, (1,000 m)/(1 km) is a conversion factor because 1,000 m = 1 km. (1 ft)/(12 in) is a conversion factor because 1 ft = 12 in.
Precise  -  A term used to connote how accurate a measurement is. The more significant digits in a measurement, the more precise that measurement is.
Scientific Notation  -  A number written as a product of a single digit and a power of 10.
Significant Digits  -  The number of digits after the given number has been put into scientific notation. The number of digits that are known in a measurement, plus one digit that is estimated.

Marketing Management / Edition 15

Diagnostic and Statistical Manual of Mental Disorders (DSM-5®) / Edition 5