Exercise

# How many visitors could your site get (3)?

In the last exercise, you updated the probability distribution over the underlying proportions of clicks (`proportion_clicks`

) using new data. Now we want to use this updated `proportion_clicks`

to predict how many visitors we would get if we reran the ad campaign.

Instructions 1/5

**undefined XP**

The result from the last exercise is still in the data frame `posterior`

, but if you look at `posterior$n_visits`

you'll see it's just `13`

repeated over and over again. This makes sense as `posterior`

represents what the model knew about the outcome of the last ad campaign after having seen the data.

- Assign
`posterior`

to a new variable called`prior`

which will represent the uncertainty regarding the new ad campaign you haven't run yet.