public static long variance(long[] values, final int start, final int length) {
        return (long) Math.round(varianceDouble(values, start, length));
    }
public static long variance(long[] values, final int start, final int length) {
        return (long) Math.round(varianceDouble(values, start, length));
    }
public static long variance ( long [ ] values , final int start , final int length ) { return ( long ) Math . round ( varianceDouble ( values , start , length ) ) ; }
Calculates variance
@param values values
@param start start
@param length length
@return variance
Calculates variance