Use advertising stats to predict how well an app will perform

I just released a new game 24 hours ago and I am running a campaign with appbrain to get some installs and hopefully get up in the rankings.

So far my rankings are like this:
Impressions: 8,177
Clicks: 92
CTR: 1.13%
Installs: 31

I don’t think the CTR matters so much because there is no way to know how high in the list my game is placed and users are more likely to click on the games placed at the top.

But the installs/clicks ratio should give some valuable info about how your game is seen by other people.

Based on my stats, 33% of the people looking at my game page have installed my game.

Do you think that is a good number? What are your numbers?