Intervals & Tests
Hypothesis Test Of Sample Mean Example
Hypothesis Test Of Two Sample Variances Example
Hypothesis Test Of A Standard Deviation Compared To A Standard Value Example
Properties of Distributions
Level of Significance
Area Under the Standard Normal Curve
Central limit theorem
Non-Normal Distributions in the Real World
Rayleigh Distribution for True Position
Critical Values of the t Distribution
Used as an indication of the reliability of x-bar as an estimate of the mean of the population. Smaller numbers mean the estimate of the population average has less variability. To calculate, use the standard error formula below.
where N is the total number of observations, and σx is the Population Sigma .
Learn more about the Statistical Inference tools
for understanding statistics in Six Sigma
Demystified (2011, McGraw-Hill) by Paul Keller,
in his online Intro. to Statistics short course (only $89)
online Black Belt certification training course ($875).