# Frequency $\times$ Midpoint = What?

When finding the mean of grouped data, at some point you need to do: Frequency $\times$ Midpoint = .....

Could someone tell me the name of the answer, does it have a name? Its labeled as fx in alot of places, but i dont actually know what to call it?

Thanks

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I would normally call it $f \times m$, although if you want to give it a name you could say that it was an estimate of the total for that class interval (or group).