Method variance

src/org/antlr/codebuff/misc/BuffUtils.java:70–78

(List<Integer> data)

	}

	public static double variance(List<Integer> data) {
		int n = data.size();
		double sum = 0;
		double avg = sum(data)/((double) n);
		for (int d : data) {
			sum += (d-avg)*(d-avg);
		}
		return sum/n;
	}

	public static double varianceFloats(List<Float> data) {
		int n = data.size();