Tell me about a time you made a decision without having much data

I faced this situation every day in my job of a call center operator. We were making cold calls, and I had very little information about the prospects. I had five different versions of a short sales pitch ready, one minute long each, each fitting a different group of people. This depended a lot on their life situation but also emotions and priorities. Logically I did not have the information about the customer, and had to decide which pitch to use on a call. My strategy was to try to deduce as much as possible from the few initial words of the prospect–whether they were in work, at home, how they felt on a given day. I choose one of the pitches, and when I wasn’t sure, I went with the most successful one statistically. At the end of the day you can’t hesitate on such a call. Saying something is better than not saying anything at all.