Tools

Intervals & Tests

Confidence Intervals

Hypothesis Testing

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

Resampling (Bootstrapping)

Tolerance intervals

Distributions

Properties of Distributions

Level of Significance

Normal Distributions

Area Under the Standard Normal Curve

Central limit theorem

Johnson Distributions

Non-Normal Distributions in the Real World

Weibull Distribution

Folded-Normal Distribution

Rayleigh Distribution for True Position

Critical Values of the t Distribution

Chi-Square Distribution

Population sigma

The standard deviation of the population from which the sample was drawn.

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where N is the total number of observations, and x-doublebar is the Average .

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) or his online Black Belt certification training course ($875).