A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of 6 tubes is taken every three hours and weighed with the following results: 
What is the lower control limit for the mean?
Definitions:
Metrics
Standardized measurements used to evaluate and compare the performance of processes, products, or organizations.
Assemble-to-Order (ATO)
A production strategy where products are assembled only after receiving a customer's order, allowing for customization.
Finished Goods Inventories
Stocks of completed products awaiting sale or shipment, representing one of the critical components of a company's inventory.
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