It's a follow up call in regards to a Letter sent for a Survey. In this case it was the Tobacco, Alcohol, Drug Survey.

This call was to verify the number & person is correct. Also to arrange a time for someone to call to do the Survey.

The questions he asked were in the wrong order. (he wanted my cell number, postal code, number of people who smoke, age) As the number was displayed as Unknown Name I didn't give my cell or postal code (just area), When I said I was over 40 he ended the call because the survey is for 15-24 years habits.  After a short introduction age should be the first question.

In addition I don't understand a survey that focuses on Home habits instead of places I visit or work.