Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

An explanation of the methodology for 538's current polling averages. 538 goes through many steps to calculate its polling averages. ABC News Photo Illustration This is an old version of our polling ...

Jason Fernando is a professional investor and writer who enjoys tackling and communicating complex business and financial problems. Erika Rasure is globally-recognized as a leading consumer economics ...

Quantitative research relies on analyzing statistical data, while qualitative research focuses on answering important business questions, including discovering why customers select products or ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...

Businesses often perform research to identify consumer buying habits and preferences. It's rarely possible to study all consumers in particular population segment, which means business researchers ...