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 ...

Error bars illustrate the margin of error for a survey estimate by showing how precise that estimate is. Here are some answers to common questions that might help you better understand charts with ...

Journal of Agricultural, Biological, and Environmental Statistics, Vol. 1, No. 1 (Mar., 1996), pp. 131-140 (10 pages) In recent years, more robust methods of estimating the size of a closed population ...

Confidence intervals show the likelihood a data range contains the true mean, aiding investment decisions. A wider interval suggests lower estimate accuracy, influencing market and risk analysis ...