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A bottling company offers three kinds of delivery service - instant, same day and within five days. The profit per delivery varies according to the kind of delivery. The profit for an instant delivery is less than the other kinds because the driver has to go directly to a grocery store with a small load and return to the bottling plant. To find out what effect each type of delivery has on the profit picture, the company has made the following tabulation based on deliveries for the previous quarter. What is the weighted mean profit per delivery?
Dissolved Oxygen
The amount of oxygen that is present in water, which is essential for the survival of fish and other aquatic organisms.
Water Pollution
Water pollution is the contamination of water bodies, such as rivers, lakes, oceans, and groundwater, caused by pollutants that harm living organisms and the environment.
Confidence Interval
A span of numbers, originating from sample data, which probably encompasses the value of an unspecified population characteristic.
Degrees of Freedom
The number of independent values or quantities that can vary in the analysis of statistical data, which are necessary to calculate a statistic.
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