It's Survey Sampling -- they are calling to take surveys on various topics -- community, IRS issues, political issues.   I don't know if they're legit or not, they seem to be.   However, most of the calls I get from them start out with dead air, and I hang up after about 5 to 10 seconds of this nonsense.  They are currently calling from various numbers in the Cambridge MN area;  have received calls from this number as well as 763- 200-9344, 763-691-7940 and 763-237-3111.