stats(columnName) {
        return {
            sum: this.sum(columnName),
            mean: this.mean(columnName),
            min: this.min(columnName),
            max: this.max(columnName),
            var: this.var(columnName),
            varpop: this.var(columnName, true),
            sd: this.sd(columnName),
            sdpop: this.sd(columnName, true)
        };
    }
Compute all the stats available with the Stat module on a numeric column.
@param {String} columnName The column to evaluate, containing Numbers.
@returns {Object} An dictionnary containing all statistical metrics available.
@example
df.stat.stats('column1')