Control Charts for Variables Are Based on Data That Come

question 147

Multiple Choice

Control charts for variables are based on data that come from:

• A) acceptance sampling.
• B) individual items.
• C) averages of small samples.
• D) averages of large samples.
• E) the entire lot.

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Definitions:

Confidence Estimate

A range of values used to estimate a parameter, calculated in such a way that it is likely, to a specified level of confidence, to contain the true value of the parameter.

Confidence Interval

A set of values, calculated from sample statistics, predicted to hold the value of an unobserved population parameter.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, indicating how much the values differ from the mean.

T-Distribution

A probability distribution used in statistics that arises when estimating the mean of a normally distributed population in situations where the sample size is small and population variance is unknown.