It is the most appropriate way of presenting an average for data with a log-normal distribution. Press the Equals button. Mean Number of Cases and Standard Deviation are included by default.
Drag the variable of interest from the left into the Variables box on the right.
In the Numeric Expression box enter the function MEAN. Another descriptive statistic worth bearing in mind is the geometric mean. To calculate the geometric mean values for columns of data. Options window where you can select what statistics you want to see.