TABLE 18-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic.Accordingly,the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day. 
-Referring to Table 18-3,suppose the analyst constructs an 
chart to see if the production process is in-control.What is the center line for this chart?
Definitions:
Percentage of Sales
A financial ratio that compares a company's profitability, expanses, or other financial indicators to its total sales, often expressed as a percentage.
Percentage of Receivables
A method used to estimate the amount of receivables that will not be collected by calculating a percentage based on historical data.
Key Parties
Key parties refer to the main individuals or groups involved in a specific area of business, such as stakeholders in a project or transaction.
Note
A financial document that represents an agreement for one party to pay another by a certain date, often used to denote debt.
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