The base of the natural logarithm function, equal to approximately 2.71828. The constant e is an irrational number, and is defined by the infinite sum 1/0! + 1/1! + 1/2! + 1/3! + 1/4! + 1/5!...
Also called Euler's number or Napier's constant, e can be used to calculate exponential growth and decay, as well as probability values. In statistics, e is often used in formulas to model various data distributions, including the normal "bell-shaped" curve. It is also used to calculate probabilities for response variables in logistic regression.
The constant e also has useful applications in engineering, such as electrical transportation (to calculate length, weight, and stress of cables and conducting wires), superstructure (to compute elastic curves and deflection of suspension bridges), and aerospace (to determine ideal surface coatings for aircraft).
In Minitab, you can use the Calculator to return the value of e. You can also use the predefined constant K999.