Given the Following Process Control Data for a Quality Attribute

question 109

Short Answer

Given the following process control data for a quality attribute (three samples of size 400 each):
If the process is known to produce 11 percent defectives on average,what is the mean of the sampling distribution of sample proportions for whenever this process is under control? The standard deviation?

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Definitions:

Return on Investment

A measure of the profitability and efficiency of an investment, calculated as net profit divided by the cost of the investment.

Selling Price

The price at which a product or service is sold to the customer.

Split-off Point

is the stage in a process where multiple products are derived from the same materials or process and each becomes separately identifiable.

Joint Processing Costs

Expenses incurred during the process of producing multiple products from a common input or process before they are split into separate products.