Standard Deviation Confidence Interval2


This demonstration allows users to compute confidence intervals for population standard deviations and variances. The user may enter the degrees of freedom (up to 200), the sample standard deviation (5 decimals), and the alpha level (5 decimals), which is 1 - confidence level. The algorithm outputs the lower and upper boundaries for the standard deviation confidence interval and the variance confidence interval to 5 decimals. It also produces the Chi^2_L and Chi^2_R values used in the computations of the confidence intervals. This is an improvement on my previous program to include more decimals and additional information.