In Performing Routine Quality Control on a Particular Laboratory Test,a

question 2

Multiple Choice

In performing routine quality control on a particular laboratory test,a high-quality control value is obtained that changes the mean.What type of change does this represent?

• A) Trend
• B) Standard deviation
• C) Shift
• D) Central tolerance

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Definitions:

Sampling Distribution

The probability dispersion of a particular statistic, facilitated by a randomly selected sample.

Z-Value

A statistical measure that quantifies the number of standard deviations a data point is from the mean of a data set.

Standard Error

A measure of the statistical accuracy of an estimate, equal to the standard deviation of the theoretical distribution of a large population of such estimates.

N

A symbol often used to represent a sample size or the number of observations or units in a dataset.