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 ...

Ryan Eichler holds a B.S.B.A with a concentration in Finance from Boston University. He has held positions in, and has deep experience with, expense auditing, personal finance, real estate, as well as ...

Caroline Banton has 6+ years of experience as a writer of business and finance articles. She also writes biographies for Story Terrace. Chip Stapleton is a Series 7 and Series 66 license holder, CFA ...

Standard deviation is a metric that shows the variability of a security’s returns over time. It can be used to gauge volatility based on past performance and compare a future return to past returns.

A t-test for a population mean tests the population mean against a hypothesized value. It is appropriate when the population standard deviation is unknown and the sample size is small. This applet ...

In response to my article, Is the Stock Market Too Concentrated?, which relied upon standard-deviation calculations to assess investment risk, a reader wrote: “My problem [with your argument] is ...