In One Region, the September Energy Consumption Levels for Single-Family

question 127

Multiple Choice

In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. For a randomly selected home, find the probability that the September energy consumption level is between 1100 kWh and 1225 kWh.

• A) 0.0910
• B) 0.2881
• C) 0.3791
• D) 0.1971

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Definitions:

Indifference Curves

Graphical representations in economics showing combinations of goods among which a consumer is indifferent, helping to analyze consumer choices.

Nickels

A five-cent coin made by the United States Mint.

Quarters

In financial and business terms, one of the four three-month periods into which the fiscal year is divided for reporting and forecasting purposes.

Marginal Rate

The rate at which something changes with each additional unit, such as the marginal tax rate, which is the rate applied to each additional dollar of income.