The Royal Badge of Wales, a coat of arms designed on behalf of the National Assembly for Wales, will feature on the banknotes alongside symbols representing the other three home nations.
Best Answer: It is possible for the standard deviation to be greater than the mean, even if all data points are positive numbers. However, the only way for this to happen is for most, if not all, data points to be at the extremes (with one extreme much greater in magnitude than the other) and nothing near the average.
If the data set follows a Normal distribution, standard deviation tells you a great deal about how spread out your samples are and the number of samples you can expect at various distances from the mean. If the data set is non-normal, standard deviation is a lot less useful most of the time. But there is still Chebyshev's inequality, which can give you some potentially useful bounds that apply even to non-normal distributions. (At least 1-1/k^2 of the distribution's values are within k standard deviations of the mean.)