n variable:group
tabstat medage, stat(n mean min max) by(medagequart)
n: r(N) Number of Observations -------- ------------------------------ Total Integers Nonintegers | # Negative - - - | # Zero - - - | # Positive 6 6 - | # ----- ----- ----- | # Total 6 6 - | # Missing - +---------------------- ----- 40 6 (1 unique value) Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- n | 6 40 0 40 40 @mean 40.000 @sd 0.000 @min 40.000 @max 40.000 @values 40 @type float @label r(N) @class constant @N_unique 1 @N 6