Melissa Horton is a financial literacy professional. She has 10+ years of experience in the financial services and planning industry. Robert Kelly is managing director of XTS Energy LLC, and has more ...

Learn how representative samples and random samples differ and why combining them minimizes sampling bias for accurate data.

In a simple random sample, each individual in the population has an equal probability of being chosen. Additionally, each sample of size n has an equal probability of being the chosen sample. This ...

When that message comes from Uncle Sam, it’s often delivered in the form of a survey. The federal government amasses an astounding amount of data each year from nationally representative surveys on ...