Calculates the exponent to which 10 must be raised to equal a given number. For example, 102 = 100, so the log base 10 of 100 is 2. Log base 10 is defined only for positive numbers. When you multiply a number by 10, you increase its log by 1; when you divide a number by 10, you decrease its log by 1.
In number, specify the value or column of values. Minitab computes the value x such that 10x = the number. If you enter 0 or a negative number, Minitab stores a missing value *.
In statistics, log base 10 (log10) can be used to transform data for the following reasons: