OTOH, a linear combination of Gaussians with a standard deviation of 15 and different means will not be a Gaussian and will have a standard deviation larger than 15. So a naive calculation as in trist’s comment below will be an underestimate.
OTOH, a linear combination of Gaussians with a standard deviation of 15 and different means will not be a Gaussian and will have a standard deviation larger than 15. So a naive calculation as in trist’s comment below will be an underestimate.