# FAQ: Variance - Distance From Mean

This community-built FAQ covers the “Distance From Mean” exercise from the lesson “Variance”.

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This exercise can be found in the following Codecademy content:

## FAQs on the exercise Distance From Mean

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1 Like

What is the difference between “np.average()” and “np.mean()”?

1 Like

I recently searched for the same thing and found the following Stack Overflow question:

There seems to be no difference if you simply apply to a list of numbers without giving any optional parameters.

The biggest difference is that `np.average()` can compute a weighted average, but `np.mean()` cannot. That is, if you want to find a weighted average, use `np.average()`.

In addition, `np.mean()` can specify a data type for calculating with `dtype`, but `np.average()` cannot.

1 Like

So I came upon this stage and I was entering the actual, numerical results of `grade - mean`, i.e. 2.2, etc. Kept getting an error message and, as it turns out, it actually wants you to write the formula.

Summary

That is `difference one = 88 - mean`.

Not so much a spoiler as a gotcha, IMO. Hope it helps.