To use this function, choose .
Calculates logarithms to the base e, where e is the constant equal to approximately 2.71828. The natural log of any positive number, n, is the exponent, x, to which e must be raised so that ex = n. For example, e2 = 7.389, so the natural log of 7.389 is 2.
The following graph represents the natural log function.
In number, specify the value or column of values. Minitab calculates the value x such that ex = the number. If you enter 0 or a negative number, Minitab stores a missing value symbol *.
The function of the natural log has many applications, such as modeling exponential growth in biological populations and in financial theory, and calculating radioactive decay.
The natural log is also used in the calculation of probability density functions for many distributions.