If your arrow keys are not working in Excel, there are a few simple ways to troubleshoot and solve this problem.

The simplest way to think about SCAN is that it applies a custom calculation to each element in a range/array and returns every intermediate result it produces along the way. If that sounds abstract, ...

The GEOMEAN and HARMEAN are advanced statistical functions that typically require a deeper understanding of mathematics. This is probably why they aren't taught as often as the AVERAGE function.

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