Taluvusvahemikku

Taluvusvahemikku is an Estonian term used in statistics and quality control to denote a tolerance interval. It refers to a statistical range of values that is deemed acceptable for a population of measurements or for a process, given explicit guarantees about coverage and confidence.

Unlike fixed tolerance limits that specify a single boundary for every item, a taluvusvahemikku expresses the expected variation across a population. It states that, with a chosen confidence level, a specified proportion of measurements will fall within the interval [L, U].

There are two main methods for deriving a taluvusvahemikku. Parametric intervals assume a known distribution (often normal) and use the sample mean and standard deviation to compute lower and upper bounds. Nonparametric intervals do not assume a distribution and rely on the order statistics of the data.

In practical applications, taluvusvahemikku is used to assess process capability, validate measurement systems, set acceptance criteria, and communicate quality requirements. For example, a manufacturer may report that the wheel-assembly diameter lies within a certain interval with 95 percent confidence that it covers 99 percent of produced parts.

References to taluvusvahemikku appear in Estonian statistical texts, metrology standards, and quality-control documentation. The concept aligns with the broader statistical idea of tolerance intervals and helps specify acceptable variation without prescribing exact values for every item.