Answer to Question #138846 in Statistics and Probability for Jeanina Muñoz

Question

Why standard deviation is the better measure of variability?

Answer 1

Standard deviation is a better measure of variability especially when distribution is normal or approximately normal because the proportion of distribution within a given number of deviation from the mean can be calculated. It gives an idea of how much every element of a population varies from the average, unlike the range which only tells the maximum variance.