A Town's Department of Public Works Is Concerned About Adverse

question 44

Essay

A town's department of public works is concerned about adverse public reaction to a sewer project that is currently in progress.Because of this, the Commissioner of Public Works has authorized a weekly survey to be conducted of town residents.Each week, a sample of 100 residents is questioned on their feelings towards the project.The results to date are shown below.Analyze this data using control charts that would provide for a 5% risk of Type I error.

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Definitions:

Standard Deviation

A measure of the dispersion or variability of a set of data points, indicating how spread out the data are from their mean.

Subtract

The action or method of deducting one number or quantity from another.

Variance

A statistical measure of the dispersal or spread of a set of numbers, indicating how much the numbers vary from the average of the set.

Represent

To depict or stand in for a population or set of data in a study or analysis.