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The Mean Weight of Trucks Traveling on a Particular Section

question 71

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The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate of the population mean. He selects and weighs a random sample of 49 trucks and finds the mean weight is 15.8 tons. The population standard deviation is 3.8 tons. What is the 95% confidence interval for the population mean?


Definitions:

Creditor

An entity (person or institution) that lends money or extends credit to another entity.

Investor

A person or organization that invests money anticipating financial gains in return.

Discount Rate

The interest rate used to determine the present value of future cash flows in discounted cash flow analysis.

Present Value

The current worth of a future sum of money or stream of cash flows, given a specified rate of return.

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