What is another word for second moment?
Pronunciation: [sˈɛkənd mˈə͡ʊmənt] (IPA) 
The term "second moment" refers to a statistical measure of a distribution's spread. In mathematics and statistics, there are several synonyms for this term, including variance and second central moment. These synonyms all describe the same concept, but use different mathematical formulations to calculate it. For example, variance is commonly used to describe the spread of data in probability theory and is calculated by subtracting the mean from each observation and squaring the result. The second central moment, on the other hand, measures the average squared distance from the mean and is often used in statistical analysis. Regardless of terminology used, all of these measures provide critical insight when analyzing data in mathematical or statistical contexts.
