Regarding Control Charts,changing from Three-Sigma Limits to Two-Sigma Limits

question 172

Multiple Choice

Regarding control charts,changing from three-sigma limits to two-sigma limits:

• A)increases the probability of concluding nothing has changed,when in fact it has.
• B)increases the probability of searching for a cause when none exists.
• C)decreases the probability that the process average will change.
• D)decreases the probability that defects will be generated by the process.

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Definitions:

Expected Count

In contingency tables, the theoretical frequency of occurrences expected under a specific hypothesis, crucial for chi-square tests of independence.

Simple Random Samples

A subset of a statistical population in which each member has an equal chance of being chosen, ensuring unbiased representation.

SPSS Output

The results generated by the Statistical Package for the Social Sciences, displaying statistical analysis, tables, charts, and tests performed on data.

Chi-square Statistic

A statistical test used to compare observed data with data we would expect to obtain according to a specific hypothesis.