I am trying to add 5% Gaussian noise to the signal.

I created noise like this way.

```
mu, sigma = 0, 1
noise = np.random.normal(mu, sigma, data.shape)
```

I am bit confused about this 5% term, is it related to standard deviation.

Or it is like create a noise and add 5% of it to signal.

Or get 5% of the signal and add noise to it.

Can some one guide me how to do this with code