This applet allows users to drag sliders to change the confidence level and sample size. The applet helps users visualize the meaning of the phrase "C% confidence," by showing that C% of the samples ...

In countries like China, as much as half the national gross domestic product comes from public-sector investments. But in the U.S., consumption is king. About 70% of the U.S. GDP is the result of ...

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Marguerita is a Certified Financial Planner ...

A confidence interval is a statistical concept that shows how likely it is that a range based on a sample of a population contains the mean, or the actual figure, for that data set. It's useful when a ...

Confidence intervals estimate likelihood of a data set's accuracy, aiding financial decisions. Utilizing confidence intervals in risk management helps stabilize cost forecasts. Larger sample sizes ...