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 six tubes is taken every three hours and weighed with the following results: 
What is X-bar for 7 pm?
Definitions:
Cost Structure
The composition of a company's fixed and variable costs, which influences its profitability and pricing strategies.
Special Order
A one-time or unusual order for products or services, often requiring customization or a departure from standard production processes.
Fixed Costs Per Unit
Fixed costs per unit decrease as production increases because the total fixed costs are spread over a larger number of units.
Selling Price
The amount of money charged for a product or service, or the sum for which something is sold.
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