Final answer:
Delivery time for a dessert during a dinner party should be immediate since it involves just plating, while furniture delivery time can be calculated using statistical methods like confidence intervals, based on average delivery times and standard deviation.
Step-by-step explanation:
The question relates to the operation of a business, specifically a restaurant or a furniture delivery service, regarding the time it takes to deliver a product after an order is placed. For desserts like brownies at a dinner party, if we follow the scenario where two brownies are served per person and there are ten people, then delivery is immediate since there's no wait time involved except perhaps the time taken to plate them. However, when we consider Richard's Furniture Company, which operates delivery from 10 a.m. to 2 p.m., the waiting time can vary. In statistical terms, for example, when calculating the confidence interval for delivery times, if we have a mean delivery time of 36 minutes with a population standard deviation of six minutes, and use a sample size of 50 restaurants, we could calculate a 90 percent confidence interval estimate for the population mean delivery time.
Furthermore, in a scenario where customers arrive every two minutes on average, it then takes on average six minutes for three customers to arrive, indicating a service rate or the speed of delivery service at the store.