(Solution Download) 1 Evaluate the geographic options offered by STS Do they

1. Evaluate the geographic options offered by STS. Do they seem to cover all the bases?
2. Evaluate the STS method of random-digit dialing.

Scientific Telephone Samples (STS), located in Santa Ana, California, specializes in selling sampling frames for marketing research. The STS sampling frame is based on a database of all working residential telephone exchanges in the United States. Thus, STS can draw from any part of the country?no matter how large or how small. The information is updated several times per year and cross-checked against area code and assigned exchange lists furnished by telephone companies. Exchange and/or working blocks designated for business or governmental telephones, mobile phones, and other commercial services are screened out.


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