An X-Bar Control Chart Was Examined and No Data Points

question 230

Multiple Choice

An x-bar control chart was examined and no data points fell outside of the limits. Can this process be considered in control?

• A) Not yet, there could be a pattern to the points.
• B) Not yet, the R-chart must be checked.
• C) Not yet, the number of samples must be known.
• D) Yes.
• E) Both A and B

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Definitions:

Cluster Sampling

A sampling technique where the population is divided into groups, or clusters, and a random sample of these groups is selected for study.

Grocery Store

A retail store that primarily sells food, including fresh produce, meats, dairy, and pantry items, often along with household goods.

Sampling Error

The error that occurs due to the selection of a sample from a population that is not perfectly representative, potentially leading to inaccurate results.

Sample Variance

A measure of the dispersion or variability of a data set, calculated from a sample of the population.