I've just recently started going over my Statistics 101 notes from the past and I have a few questions about which statistical averages I should use when making calculations. Specifically, I'm interested in deviation averages.

In which cases should I use average deviation (AVEDEV), variance (VARP) and standard deviation (STDEVP)? I know that standard deviation is the most popular statistical tool to calculate deviations from the mean, but there has to be some application to the other deviation averages as well and I am at a loss to find any credible answers. My textbook has no answers, neither was I able to find any good answers online. Help?

In which cases should I use average deviation (AVEDEV), variance (VARP) and standard deviation (STDEVP)? I know that standard deviation is the most popular statistical tool to calculate deviations from the mean, but there has to be some application to the other deviation averages as well and I am at a loss to find any credible answers. My textbook has no answers, neither was I able to find any good answers online. Help?

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