Forget the Math — For Good Sampling You Need Equality, Inclusion, and Representation.

Forget the Math — For Good Sampling You Need Equality, Inclusion, and Representation

In basic stats class, all of us learned about the importance of random sampling. It provides the foundation for the iron-clad mathematics of estimation, statistical significance, and margins of error. But the problem in social science, market research, and opinion polling is that random sampling (sometimes referred to as probability sampling) almost never exists. So…

The Error in Your Smartphone Surveys

The Error in Your Smartphone Surveys

Any good researcher should agonize over mode effects in surveys. Mode effects are differences in statistical estimates caused by the “mode” through which respondents take a survey. If there are mode effects, then how the survey is conducted (by telephone, online, through a smartphone app, in person, or by mail) will affect the results, requiring…