Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Although 24-h urine collection is widely considered the ’gold standard’ for estimation of population sodium intake, spot urine collection is increasingly used as a convenient and affordable ...

This is a preview. Log in through your library . Abstract Methods for estimating the size of a population of individuals usually require multiple samples from the group. We consider a population ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

In 2010, three psychologists from the University of British Columbia published a paper with an intriguing title: The WEIRDest people in the world? Paradoxically, the paper was about Americans. The ...

We propose new model-based methods for unit non-response in two-stage survey samples. A commonly used design-based adjustment weights respondents by the inverse of the estimated response rate in each ...

This web calculator conducts a z-test for the difference between two populations' proportions. The calculator includes an explanation of inputs and outputs. This web calculator conducts a z-test for ...

As a business owner, you are constantly figuring out what your current customers want and what your potential customer needs. The data can be tracked in a variety of ways, from polls and surveys to ...

Much has been written about psychology's reliance on WEIRD samples. "WEIRD" is an acronym coined by Henrich, Heine, and Norenzayan: samples that are drawn from populations that are White, Educated, ...