I recently attended a discussion at Fifth Elephant on privacy. During the panel, one of the panelists asked the audience: "how many of you are concerned about your privacy online, and take steps to protect it?"

At this point, most of the hands in the panel shot up.

After that …

I recently gave a talk at the Fifth Elephant 2018. The talk was an introduction to linear regression and generalized linear models from the Bayesian perspective. The slides are available here.. Go check it out.

In principle A/B testing is really simple. To do it you need to define two separate user experiences, and then randomly allocate users between them:

def final_experience(user):
    if random.choice([0,1]) == 0:
        return user_experience_A(user)
    else:
        return user_experience_B(user)

So far this seems pretty simple. But then …