Centre of the Universe

The geometric mean is similar to the arithmetic mean in that it is a type of average for the data, except it has a rather different way of calculating it.

The geometric mean is defined as the n-th root of the product of each value in the data set, where n is the number of data points in the set. This makes it useful for describing things such as percentage growth.

		public static double GeometricMean(double[] data, int items)
		{
			int i;
			double GMean, prod;

			prod = 1.0;

			for (i = 0; i < items; i++)
			{
				prod  *= data[i];
			}
			GMean =  Math.Pow(prod, (1.0 / (double)items));
			return GMean;
		}

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