Is there a way to use the statistics key strokes on the HP12C to calculate the standard deviation of returns with a weighted average?

I can only figure out how to do it with an arithmetic mean.

Is there a way to use the statistics key strokes on the HP12C to calculate the standard deviation of returns with a weighted average?

I can only figure out how to do it with an arithmetic mean.

The BAII is the machine for me, but I looked up how to do this on the HP:

Pages 106-109