Need help with Python for Finance code Repo 24.2

Question

https://code.sololearn.com/c02rb6V4Q8tz/?ref=app

I tried to run this code, but I got an error "nameError name 'mean' is not defined how canI fix this?

Answer 1

It's np.mean not np,mean
(remove the comma)

Answer 2

it worked, TY!