The Mean Weight of Trucks Traveling on a Particular Section

question 76

Multiple Choice

The mean weight of trucks traveling on a particular section of Highway 401 is not known. A provincial highway inspector needs an estimate of the mean. He selects a random sample of 49 trucks passing the weighing station and finds the mean is 15.8 tons, with a standard deviation of the sample of 3.8 tons. What is the 95 percent interval for the population mean?

• A) 14.7 and 16.9
• B) 13.2 and 17.6
• C) 10.0 and 20.0
• D) 16.1 and 18.1

---

Definitions:

Utility-Maximizing

The principle that consumers will allocate their income in a way that maximizes their overall satisfaction or utility.

Investment Portfolio

An assortment of financial assets such as equities, bonds, raw materials, as well as liquid assets including mutual funds and exchange-traded funds (ETFs).

Indifference Curves

Graphical representations used in microeconomics to show combinations of two goods that provide a consumer with the same level of satisfaction.

Standard Deviation

A statistical measure of the dispersion or variability in a set of data points or distributions.