Standard Deviation is a statistical measure that describes how much variation or dispersion there is in a set of data points. It helps us understand how spread out the values in a dataset are compared to the mean (average). Learn how to calculate mean deviation using different statistical averages such as arithmetic mean , median, and mode. Understand the concept with a detailed solved example. For ungrouped data or data that is not properly arranged, that is, the given data is in raw form, the mean deviation is calculated using the formula , Mean Deviation = ∑i = 1n |xi - x̄| / n
